Physics Unit27: Early Quantum Theory and Models of the Atom

1#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

In a pair of accelerating plates,.vlt 5q, prqnm .a5w+d such as found inside a CRT, the electrons are emittedq.5q 5 pmln.,+awtvrd

A. from the cathode which is positive, toward the anode which is positive.

B. from the cathode which is negative, toward the anode which is positive.

C. from the anode which is positive, toward the cathode which is negative.

D. from the anode which is negative, toward the cathode which is positive.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

2#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A blackbody is an idc k ;ii; ss//sqeei,d3m( /wg dw(uk*leal system that

A. absorbs 100% of the light incident upon it, but cannot emit light of its own (i.e., a "black" body).

B. emits 100% of the light it generates, but cannot absorb radiation of its own.

C. either absorbs 100% of the light incident upon it, or emits 100% of the radiation it generates.

D. absorbs 50% of the light incident upon it, and emits 50% of the radiation it generates.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

3#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Which color in the visible spectrum is associated with the lowe p2m. qozie,f-c,dl27 mrjof 6st temperature?

A. blue

B. green

C. orange

D. red

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

4#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Planck's constant

A. sets an upper limit to the amount of energy that can be absorbed or emitted.

B. sets a lower limit to the amount of energy that can be absorbed or emitted.

C. relates mass to energy.

D. none of the given answers

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

5#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The ratio of energy to frequency for a given photon , uy. c1;rjdytgives

A. its amplitude.

B. its velocity.

C. Planck's constant.

D. its work function.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

6#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The fundamental SI units of Planck's cxd/n j4hj(z7/: q:0kl zsts6inq-dv- z m5n yjonstant are

A. $kg \cdot m/s$.

B. $kg \cdot m^{2}/s$.

C. $kg \cdot m/s^2$.

D. $kg \cdot m^{2}/s^2$.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

7#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Planck's constant hasuai1c5: j /e i1ple0tv m4h;hdo2 d:my a value of

A. $1.055 \times 10^{-34} \; J \cdot s$.

B. $6.626 \times 10^{-34} \; J \cdot s$.

C. $8.85 \times 10^{-12} \; J \cdot s$.

D. $8.988 \times 10^{9} \; J \cdot s$.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

8#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A photon is a particle 5yszltmj;.j22naz5+m0 /. u )ygwbrv +hzx ot that

A. has zero electric charge.

B. has zero electric field associated with it.

C. cannot travel in a vacuum.

D. has a velocity in a vacuum that varies with the photon frequency.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

9#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Which of the followib( unbqp1pv *o y0vm0tp 2pw/+ng is an accurate statement?

A. In vacuum, ultraviolet photons travel faster than infrared photons.

B. Photons can have positive or negative charge.

C. An ultraviolet photon has more energy than an infrared photon.

D. Photons do not have momentum (i.e., they cannot exert pressure on things).

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

10#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is a photon?

A. an electron in an excited state

B. a small packet of electromagnetic energy that has particle-like properties

C. one form of a nucleon, one of the particles that makes up the nucleus

D. an electron that has been made electrically neutral

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

11#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The energy of a photon df; rbq-fyl3.viputgt67 p**n epends on

A. its amplitude.

B. its velocity.

C. its frequency.

D. none of the given answers

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

12#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

If the wavelength of a photon is halved, by what factor dbo00evsao)l7)u2 od )xf o6wioes its energy change?

A. 4

B. 2

C. 1/4

D. 1/2

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

13#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Which color of light hac; bt uqbd z/h4w5a.c4s the lowest energy photons?

A. red

B. yellow

C. green

D. blue

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

14#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The photoelectric effect r zq2e6s4z5 jhdvd49bvqr2 n7 is explainable assuming

A. that light has a wave nature.

B. that light has a particle nature.

C. that light has a wave nature and a particle nature.

D. none of the above

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

15#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

In order for a photon to eject an electron from a metal's2 sseo ey.* u(ed4lu.k surface in the photoelect.k s24.l eos*eeu(y duric effect, the photon's

A. frequency must be greater than a certain minimum value.

B. speed must be greater than a certain minimum value.

C. wavelength must be greater than a certain minimum value.

D. momentum must be zero.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

16#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The kinetic energy of the photoelectron depends on which of the fo 4a9 vw(0f9iqmyt)j8 gphh w;n2wi5ri llowing?

A. intensity of light

B. duration of illumination

C. wavelength of light

D. angle of illumination

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

17#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A beam of red light and a beam of violet light each dea0u vtq+*9nf:xcrn/o g8x+px liver the same power on a surface. For which beam is the number of photons hitting the surface per second the greatexg9f rp0cn8xnq/xuo* : t+v+ ast?

A. the red beam

B. the violet beam

C. The number of photons per second is the same for both beams.

D. This cannot be answered without knowing just what the light intensity is.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

18#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A metal surface is illuminated with blue light and electromnlk+jp u 9(x;ns are ejected at a given rate each with a c;ux 9n+m(kj plertain amount of energy. If the intensity of the blue light is increased, electrons are ejected

A. at the same rate, but with more energy per electron.

B. at the same rate, but with less energy per electron.

C. at an increased rate with no change in energy per electron.

D. at a reduced rate with no change in energy per electron.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

19#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A beam of X-rays of frequency f is incident upon a substance that scatters the b nup6lt4 po-c8eam in various directionpnl6uc- p8 4ots. If we measure the frequency of the scattered X-rays, we will find

A. X-rays with frequency less than f.

B. X-rays with frequency greater than f.

C. only X-rays with frequency f.

D. X-rays with frequencies ranging from less than f to greater than f.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

20#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A beam of X-rays of wavelength l is incident upon a substance that ;1zt4u jl.h9: z 1z z1nlqt mvvh-*ukvscatters the beam in various directit uzjz1qhz;vum k1l-:9 nlthz v4*.1vons. If we measure the wavelength of the scattered X-rays, we will find

A. X-rays with wavelength less than l.

B. X-rays with wavelength greater than l.

C. only X-rays with wavelength l.

D. X-rays which range in wavelength from less than l to greater than l.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

21#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

When a photon is scattered from an electron, there will be an increase u/t b- qdg*sjgap1-f ,in its

A. energy.

B. frequency.

C. wavelength.

D. momentum.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

22#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

In the Compton effect, as the scatteringoc+jcnz; 9x zn,-.fe 61ss qvl angle increases, the frequency of the X-rays scattered at thzn6czlv en + -jo9s,s;qx1.fcat angle

A. increases.

B. decreases.

C. does not change.

D. varies randomly.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

23#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

In a Compton scattering experiment, what scattering angle at dayxmg59,n dhug) 0qi 0f2*produces the greatest change in wavelenia)mha,xf y*dd 529gg ut0q0ngth?

A. $0^{\circ}$

B. $90^{\circ}$

C. $180^{\circ}$

D. none of the given answers

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

24#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

When the accelerating voltage in an X-ray tube is doubled, spu895bp0j8q1qo8hr g yno g9the minimum wavelength of the X-rabj8 y9ohnp8oqr p59gs gu80q1ys

A. is increased to twice the original value.

B. is increased to four times the original value.

C. is decreased to one-half the original value.

D. is decreased to one-fourth the original value.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

25#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

When a proton passes through matter, it q9b5 y6ux,b h2,3 jgdh :qertbis possible for it to interact with the matter in such a way that an electron andtub:h53hg26r,bebqq jd x,9y a positron are produced; this interaction is referred to as

A. the photoelectric effect.

B. the Compton effect.

C. pair production.

D. none of the given answers

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

26#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

As a particle travels faster, 7ot n*5x3aicyits de Broglie wavelength

A. increases.

B. decreases.

C. remains constant.

D. could be any of the given answers; it depends on other factors.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

27#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

When an electron is accelerated to a higher speed, th+i8zk; xb93; zf)x/ x :hjuk(yd ro-ktk9ulgiere is a decrease in its

A. energy.

B. frequency.

C. wavelength.

D. momentum.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

28#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Which one of the following would tend to have c.yp1v ke5*ct the smallest wavelength if they are movt*.cc 5 pkyev1ing with the same speed?

A. electron

B. proton

C. baseball

D. bowling ball

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

29#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The reason the wavelike nature of a moving bashjnx.sg+ 8/(vlgwo n9eball is not noticed in everyday life is +. vj/xs 9hn8lgwo ng(that

A. it doesn't have a wavelike nature.

B. its wavelength is too small.

C. its frequency is too small.

D. its energy is too small.

E. No one pays attention to such things except for the Mets; and they can't hit a curve ball anyway.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

30#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What advantage might an electron microscope have or)4umq0i2ud os(t.9w5 tpokdnb(r:h ver a light microscope?

A. Electrons are more powerful.

B. Shorter wavelengths are possible.

C. Longer wavelengths are possible.

D. none of the given answers

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

31#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The part of an electron microscope that plays the same role as tn j* 12xqgphw,e j(d7fhe lenses do in angwq2j* 7jp(dh ex1f,n optical microscope is

A. the vacuum chamber.

B. the coils.

C. the cathode.

D. the deflector plates.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

32#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Which of the following microscopes is capable of "photographing" individualgduia0n ;j63 h atoms;a6n jhg 3d0iu?

A. light microscope

B. scanning tunneling microscope

C. transmission electron microscope

D. scanning electron microscope

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

33#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

According to the Bohr model of the atom, the angular momentum of an electron 1csbgtz uuc4-nxs :b21.:jmjj - cam+around the n4b-s2 xjtcmczbuagj1c .- u+:1n:j ms ucleus

A. could equal any positive value.

B. must equal an integral multiple of h.

C. must equal an integral multiple of h/2p.

D. decreases with time, eventually becoming zero.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

34#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

When an electron jumps from an orbit where n s h-i g )qd83xz+mf3;zy :wnzr= 4 to one where n = 2

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

35#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The distance between adjacent orbit radii in a hydrogenz16 nor ht50rr atom

A. increases with increasing values of n.

B. decreases with increasing values of n.

C. remains constant for all values of n.

D. varies randomly with increasing values of n.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

36#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The energy difference betwem:keutf5ss +8fd/ xf;en adjacent orbit radii in a hydrogen atom

A. increases with increasing values of n.

B. decreases with increasing values of n.

C. remains constant for all values of n.

D. varies randomly with increasing values of n.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

37#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the wavelength corresponding to: k0 u0mj((mhry62z mim* syce the most intense light emitted by a giant star of surface *ymjz0 mc6((m:huk0seri2m y temperature 5000 K?

A. $576 \; nm$

B. $578 \; nm$

C. $580 \; nm$

D. $582 \; nm$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

38#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the frequency of the most intense radiation from an objt-. yy/lb17jty wznn2ect with temperatur. lw 127nytt-bz n/yjye $100 ^{\circ}C$?

A. $2.9 \times 10^{-5} \; Hz$

B. $3.9 \times 10^{13} \; Hz$

C. $1.0 \times 10^{13} \; Hz$

D. $1.0 \times 10^{11} \; Hz$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

39#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

How much energy is carried by a photorp .nvoa 4rjcw +k33d0n with frequency 110 GHz?

A. $1.1 \times 10^{-20} \; J$

B. $1.4 \times 10^{-22} \; J$

C. $7.3 \times 10^{-23} \; J$

D. $1.3 \times 10^{-25} \; J$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

40#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

How much energy is carried by a photo,qjh+xzjo( 2zn with a frequency of 100,000 GHz?

A. $4.73 \times 10^{-42} \; J$

B. $4.37 \times 10^{-24} \; J$

C. $6.63 \times 10^{-24} \; J$

D. $6.63 \times 10^{-20} \; J$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

41#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What frequency of electromagnet* a4a;za xx tmymqf3hg+5 jt+.ic radiation has energy $4.7 \times 10^{-25} \; J$?

A. $710 \; kHz$

B. $4.7 \; MHz$

C. $710 \; MHz$

D. $1.4 \; GHz$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

42#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What frequency of electromagnetic radiation has an enerop-xn) )q i u)ltmq+iu(h8 mu+gy of 58.1 meV?

A. $1.4 \; MHz$

B. $711 \; MHz$

C. $7.1 \; GHz$

D. $14 \; GHz$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

43#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the photon ef3ag6 0irgm.7j+bhb inergy of red light having wavelength 640 nm?

A. $1.13 \times 10^{-19} \; J$

B. $1.31 \times 10^{-19} \; J$

C. $3.11 \times 10^{-19} \; J$

D. $1.94 \times 10^{-19} \; J$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

44#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

How much energy, in joules, i;x myep-) wq/zpt,wtj. wq;k, s carried by a photon of wavelength 660 nm?

A. $1.46 \times 10^{-48} \; J$

B. $3.01 \times 10^{-19} \; J$

C. $6.63 \times 10^{-34} \; J$

D. none of the given answers

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

45#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

At what rate are photons emitted by a 50-W sodium vapozqnn g .bhk 80(p.ecp0r lamp? (Assume that the lamp's light is monochromatic and of wavelep. kpn. cn8zhqgb 0(e0ngth $589 \; nm$.)

A. $1.0 \times 10^{20}/$s

B. $1.5 \times 10^{20}/$s

C. $2.0 \times 10^{20}/$s

D. $2.5 \times 10^{20}/$s

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

46#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A metal has a work function of 4.5 eV. Find the maj mxtsss4/i8.z .ng i2incl1 /ximum kinetic energy of the photoelectrons if the wavt4m2i8c.sxni1j/gil. /sn z selength of light is 250 nm.

A. zero

B. $0.37 \; eV$

C. $0.46 \; eV$

D. $0.53 \; eV$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

47#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

When light of wavelength 350 nm is incident on a metal surfl03 xr plea1 t4r(ui)vace, the stopping potential of the photoelectrons is 0.500 eV. What is the) 0r4tral i1(evp lux3 work function of the metal?

A. $0.500 \; eV$

B. $3.04 \; eV$

C. $3.54 \; eV$

D. $4.12 \; eV$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

48#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

When light of wavelength 350 nm is incident on a metal s: v*rife.9 cdva8 ti5vurface, the stopping potential of the photoelectrons i rcftv .ad89*:ivevi5 s 0.500 eV. What is the threshold frequency?

A. $3.47 \times 10^{14} \; Hz$

B. $3.74 \times 10^{14} \; Hz$

C. $4.73 \times 10^{14} \; Hz$

D. $7.34 \times 10^{14} \; Hz$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

49#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

When light of wavelength 350 nm is incident on a metal surface, the stoppfix:el r6z,c+4a +u bying potential of y4c +bfeir+:a l 6zu,xthe photoelectrons is 0.500 eV. What is the maximum kinetic energy of the electron?

A. $0.500 \; eV$

B. $3.04 \; eV$

C. $3.54 \; eV$

D. $4.12 \; eV$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

50#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A monochromatic light is incident on the surface of af ovd+wjw wx -;vo-3wdq 4z9j. metal with work function 2.50 eV. If a 1.0-V stopping potential is required to make the photocurrent zero, whatfdj q.--z + x3vdw4vw;owwo9j is the wavelength of light?

A. $354 \; nm$

B. $423 \; nm$

C. $497 \; nm$

D. $744 \; nm$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

51#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

If the scattering ang0vfujaxx y/dfb 8,4;dle in Compton's scattering is 90e. What is the wavelength shift? x,f 4udvy8;b0a /jdfx

A. $1.22 \times 10^{-12} \; m$

B. $2.43 \times 10^{-12} \; m$

C. $3.65 \times 10^{-12} \; m$

D. $4.85 \times 10^{-12} \; m$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

52#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

X-rays of wavelength 070lkdk)fgk 9.: kzanz.20 nm are scattered by a metal. The wavelength shift is observed to b :zkk fzakg90k.)ln7d e
$2.1 \times 10^{-12} \; m$ at a certain scattering angle measured relative to the incoming X-ray. What is the scattering angle?

A. $20^{\circ}$

B. $40^{\circ}$

C. $60^{\circ}$

D. $80^{\circ}$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

53#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

X-rays with a wavelength of 0.00100 nm are scat/w k/i 3rmg:13svdd+trkmf y -tered by free electrons at 130e. What is the kinetic energy of-:f+r k3m3dtrmvsi wk1d gy// each recoil electron?

A. $2.5 \; MeV$

B. $5.0 \; MeV$

C. $7.5 \; MeV$

D. $10 \; MeV$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

54#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the wavelength of the matter wave associated with a ball of mass 0.50 ke/uqf(- j94 vt6socm7 bldf4c g moving with a speed of 25 m/s?c 7o6fscv(mq94u- /dj f4 ebtl

A. $3.5 \times 10^{-35} \; m$

B. $5.3 \times 10^{-35} \; m$

C. $3.5 \times 10^{-33} \; m$

D. $5.3 \times 10^{-33} \; m$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

55#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the de Broglie wamnay5-;eo m h3 (+cjw85esj1ps4 c 9-llo nykdvelength of a ball of mass 200 g moving with a speed of 30 omyoh4s sa-8 55le9 cp;(1n nc-lje3+kdw jymm/s?

A. $1.1 \times 10^{-34} \; m$

B. $2.2 \times 10^{-34} \; m$

C. $4.5 \times 10^{-28} \; m$

D. $6.7 \times 10^{-27} \; m$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

56#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the wavelength of the matter wave associated with an electr;ieovb szkp 830 h6 yrja781leon moving with a speed;b s30kyvh 6aolzj1 8eep r7i8 of $2.5 \times 10^7 \; m/s$?

A. $29 \; pm$

B. $35 \; pm$

C. $47 \; pm$

D. $53 \; pm$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

57#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An electron is accelerated through a potential difference of vl ,/0zm.gl /3kqlrj -ia qnb3150 V. What is its wavelength?l -03/m n aqr./gvqlbl,j3z ik

A. $0.1 \; nm$

B. $1 \; nm$

C. $1 \; mm$

D. $1 \; cm$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

58#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An electron is accelerated by a potential difference of 100 V. What is iwe4l,r3qnyzl7 k.jn+ ts wavelength 43e.n rjl+wl7yqz, kn?

A. $0.122 \; nm$

B. $0.212 \; nm$

C. $0.221 \; nm$

D. $0.313 \; nm$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

59#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An electron is accelerated by a po7(bas oleg* ;etential difference of 100 V. What is its momentuso7 ee(;*l gbam in $kg \cdot m/s$?

A. $3.45 \times 10^{-24}$

B. $3.54 \times 10^{-24}$

C. $4.53 \times 10^{-24}$

D. $5.43 \times 10^{-24}$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

60#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An electron is accelerated by a potential difference of 100 V. Wha tr57g)(rgzm st is its kinetic e5g mrtgr )s7(znergy?

A. $1.26 \times 10^{-17} \; J$

B. $1.62 \times 10^{-17} \; J$

C. $2.16 \times 10^{-17} \; J$

D. $2.61 \times 10^{-17} \; J$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

61#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A person of mass 50 kg has a wavem /j7khrbu +r)gj0o f-length of $4.4 \times 10^{-36} \; m$ when running. How fast is she running?

A. 2.0 m/s

B. 3.0 m/s

C. 4.0 m/s

D. 5.0 m/s

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

62#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An electron has a wavelength of 0.123 nmut(h3/6k(p9 ,jogve yk 3sgry. What is its energy in eV? (This energy is not in the relativs, 93 k6ygpe(k3h/g (rjuyvot istic region.)

A. $20 \; eV$

B. $60 \; eV$

C. $80 \; eV$

D. $100 \; eV$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

63#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

If $r_1$ is the smallest orbital radius around a single proton, then $r_6$ is equal to

A. $36 r_1$.

B. $12 r_1$.

C. $6 r_1$.

D. $2.45 r_1$.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

64#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The electron of a hydro cfyrhjotmmxomi7pe:;2t *59 4*6gb jgen atom makes a transition from the n = 5 state to the n = 2 statej7fp rm*;9 6xjh 2oc omeb5 tt:*4gyim. What is the wavelength of the emitted photon?

A. $344 \; nm$

B. $434 \; nm$

C. $443 \; nm$

D. $523 \; nm$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

65#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The binding energy of the hydrogen atom in its ground state is -13.6 eV. What i8 o g5))p8b ogmf ofdw2qo:6lfs the energy when it is in the n oq25ff)8 wb)gp om6gofd:8 ol= 5 state?

A. $2.72 \; eV$

B. $-2.72 \; eV$

C. $0.544 \; eV$

D. $-0.544 \; eV$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

66#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A hydrogen atom in the grou5z/j)szi 9iwb nd state absorbs a photon of energy 12.09 eV. To which state will the electron make b5iz wjs)z9/i a transition?

A. n = 2

B. n = 3

C. n = 4

D. n = 5

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

67#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the ionization energy of the neutralo(hc +a3spp0d hydrogen atom?

A. $27.2 \; eV$

B. $13.6 \; eV$

C. $6.8 \; eV$

D. none of the given answers

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

68#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the ionization energy of singly ypt6wq;e+l.pv06 fhoionized helium?

A. $54.4 \; eV$

B. $27.2 \; eV$

C. $13.6 \; eV$

D. none of the given answers

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

69#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

In making a transition from state n = 1 to state n = 2, the ptu0 k:a7mdp,k9v h kr k+yf .ixi(ok)(7dfm7hydrogen atom must

A. absorb a photon of energy 10.2 eV.

B. emit a photon of energy 10.2 eV.

C. absorb a photon of energy 13.58 eV.

D. emit a photon of energy 13.58 eV.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

70#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

In state n = 1, the energy of the hydrogen atom is -13.58 eV. What sn (* .elae1z yu49llx,6vlrzis its energy i *9lz n6llz4 sa(exl 1ye,u.rvn state n = 2?

A. -6.79 eV

B. -4.53 eV

C. -3.40 eV

D. -1.51 eV

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

71#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The wavelength of a ruby e):hq .b:w(gt nmh6 bh+ koo)claser is 694.3 nm. What is the energy difference betwebwk)6n eqbg(o+ mh: ch).h t:oen the two energy states involved in laser action?

A. $1.537 \; eV$

B. $1.646 \; eV$

C. $1.786 \; eV$

D. $1.812 \; eV$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

72#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An electron is moving about a single proton in an orbezay1jb) 4 nci)3zmk*-d aewh+;yx 5jit characterized by n = 4. How many of the electron'*3 jm+zad-jx1z)y4n i5wyebk ehc;a)s de Broglie wavelengths fit into the circumference of this orbit?

A. 1

B. 2

C. 4

D. 16

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

		Remember me	Forgot password?
Password			Register Now

Unused Images

Used Images in Current Log

1	2	3	4	5	6	7	8	9	10
11	12	13	14	15	16	17	18	19	20
21	22	23	24	25	26	27	28	29	30
31	32	33	34	35	36	37	38	39	40
41	42	43	44	45	46	47	48	49	50
51	52	53	54	55	56	57	58	59	60
61	62	63	64	65	66	67	68	69	70
71	72

1	2	3	4	5	6	7	8	9	10
11	12	13	14	15	16	17	18	19	20
21	22	23	24	25	26	27	28	29	30
31	32	33	34	35	36	37	38	39	40
41	42	43	44	45	46	47	48	49	50
51	52	53	54	55	56	57	58	59	60
61	62	63	64	65	66	67	68	69	70
71	72

1	2	3	4	5	6	7	8	9	10
11	12	13	14	15	16	17	18	19	20
21	22	23	24	25	26	27	28	29	30
31	32	33	34	35	36	37	38	39	40
41	42	43	44	45	46	47	48	49	50
51	52	53	54	55	56	57	58	59	60
61	62	63	64	65	66	67	68	69	70
71	72