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PRACTICE:Physics Unit27: Early Quantum Theory and Models of the Atom



 Author: physics   Total Marks: 72 mks  Marks Awarded: _____________

User Name: No Login  Start Time: 23年05月01日 10:35  Switch to Whole-Paper Mode

Mark Problem
1#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  In a pair of accelerating plates, such as found insid tvpxr7 ocn-:8e a CRT, the electrons are emi8xcpr :v 7otn-tted

Correct Answer:    

Mark Problem
2#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A blackbody is an ideal syste6zg9pylx +7xs m that

Correct Answer:    

Mark Problem
3#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Which color in the visible spectrum is associated with the lowest temperatuc0cb 0ji *wsh/ ntm/9lre?

Correct Answer:    

Mark Problem
4#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Planck's constant

Correct Answer:    

Mark Problem
5#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The ratio of energy to frequency for a d jr9g3i77cwr given photon gives

Correct Answer:    

Mark Problem
6#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The fundamental SI unit, c7u.dhkyrmzljx (tu*w m 784s of Planck's constant are

Correct Answer:    

Mark Problem
7#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Planck's constant ha(nqp iyc 1qsxx629w+ vu;mul;s a value of

Correct Answer:    

Mark Problem
8#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A photon is a particle tha4+qbxls5n w,y t

Correct Answer:    

Mark Problem
9#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Which of the following is an accurat(dle;uca u) q (n,oz2fq-fzlht r;7cnf1f+:ee statement?

Correct Answer:    

Mark Problem
10#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What is a photon?

Correct Answer:    

Mark Problem
11#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The energy of a photon depends-eha5 wla 7gg8 on

Correct Answer:    

Mark Problem
12#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  If the wavelength of a j3cbq 7)0old cy 0fu(vphoton is halved, by what factor does its energy change?

Correct Answer:    

Mark Problem
13#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Which color of light has the lowest energy photong*;mudx ht;ztc5 2cpn rc) n h6ja1.8ws?

Correct Answer:    

Mark Problem
14#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The photoelectric effequ lwng ilpv6o42p,hnvw5p 4n)9 ,:whct is explainable assuming

Correct Answer:    

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's surq65x xu*((6 zabp f6imhgwl h)face in the photoelectric 6pxi6(a) (qmhxz6 bgu h l5f*weffect, the photon's

Correct Answer:    

Mark Problem
16#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The kinetic energy of the photoelectron depends on which of the followingcbu07 c c1v/iu )ydlpvcn zwf,.(/v)u?

Correct Answer:    

Mark Problem
17#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A beam of red light and a beam of vi4hla++/ qzpjb50rxvo olet light each deliver the same power on a surface. For which beam is the number of photohrxp4zb 0j 5+/+q oavlns hitting the surface per second the greatest?

Correct Answer:    

Mark Problem
18#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A metal surface is illuminated withan y.y680+yburjqtnlmh0 tl zk 4q y4-x:0pc/ blue light and electrons are ejected at a given rate each with a c + 8lh q6r 4knl/0zx-4ty ytqjpyb:n 0uy.a0cmertain amount of energy. If the intensity of the blue light is increased, electrons are ejected

Correct Answer:    

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 thhti- qk3xe. x8at scatters the beam in variok3 xt exih8.q-us directions. If we measure the frequency of the scattered X-rays, we will find

Correct Answer:    

Mark Problem
20#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A beam of X-rays of wavelength lq3tnq.n06agz mzc ,u5 is incident upon a substance that scatters the u0c q .6taqg,5n3m zznbeam in various directions. If we measure the wavelength of the scattered X-rays, we will find

Correct Answer:    

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 in itsp 11hupl 8m,ot:b d2ct

Correct Answer:    

Mark Problem
22#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  In the Compton effect, as the scattering angle increases, the frequency ofdxe6qa b i;i;tan.x 7 9rqtd fu:5l+8y the X-rays scatta7t 9 f+ax5xdd yii q8n.:tq;;6ru elbered at that angle

Correct Answer:    

Mark Problem
23#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  In a Compton scatteri9j 3j ke1d1c7x n5*; *sfyj5yyefzst gng experiment, what scattering angle produces the greatest cj1fjs3f 5t j*yy*ges7ye1 ndx kc;9z5hange in wavelength?

Correct Answer:    

Mark Problem
24#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  When the accelerating voltage in an X-ray tube is doubled, the minimum wavelen4srw 3bf(j7i wgth ofj(wsfwirb3 47 the X-rays

Correct Answer:    

Mark Problem
25#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  When a proton passes through matter, it is possible for it to interact with the :xo1wd2wz9ck matter in such a way that an electron and a positron are produ:xc1zowd29 w kced; this interaction is referred to as

Correct Answer:    

Mark Problem
26#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  As a particle travels faster, its de Bmon,r+pqr 6iq md3./wprg0zn80 vvv 5roglie wavelength

Correct Answer:    

Mark Problem
27#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  When an electron is accelerated to a higher speed, there is a decrek x9. 5wjrh2j7voziy 5ase in its

Correct Answer:    

Mark Problem
28#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Which one of the following would tend to ha otmz2 .cw8v5vz q11k)bruw3bve the smallest wavelength if they are moving with the same spv2 8c3v1mkw5rz) b.wbzoqt u1eed?

Correct Answer:    

Mark Problem
29#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The reason the wavelike nature of a moving baseball is not noticed in everyb 4qn-qzb 8lg/nc c9j(day life c9c ln b/jnqqg48-b z(is that

Correct Answer:    

Mark Problem
30#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What advantage might an electron microscope have over a light micro.*uzvy6+ t8)pdei, 5qf ouyx sscope?

Correct Answer:    

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 tr0madr.6 +(e .zbq bt(ttius5he lenses do in an optical microscope id +m5t brr.(szt (tq0uei6.a bs

Correct Answer:    

Mark Problem
32#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Which of the following microscopes is capable of "photographing" indivi4w8ku tc,e 7o8 dfv8y+s*hli idual atoms?+w,e8*cvdfsi 4htuoly 8 8 ki7

Correct Answer:    

Mark Problem
33#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  According to the Bohr model of the atoh 0zn+u u8p.qzm, the angular momentum of an electron aroundhu+0qznp.z 8u the nucleus

Correct Answer:    

Mark Problem
34#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  When an electron jumps from an orbit whejsk*e(vqe6 kdi 6gi /:re n = 4 to one where n = 2

Correct Answer:    

Mark Problem
35#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The distance between adjacent orbit radii inq:pvnoc5 4y;x a hydrogen atom

Correct Answer:    

Mark Problem
36#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The energy difference between adjacenf ab2bbzvq6pmv ;*j57t orbit radii in a hydrogen atom

Correct Answer:    

Mark Problem
37#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What is the wavelength correspon5z4i-x5e(on d68o g :fpqpezf ding to the most intense light emitted by a giant star of sur n5eppz (4qzg o:-5io86edfxf face temperature 5000 K?

Correct Answer:    

Mark Problem
38#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What is the frequency of the most intense radiation from an object with ten/e w01dw yfqf1 8u+kko1it5fmperaturekw 1n1f/fi0y kw oet8u 15+dfq $100 ^{\circ}C$?

Correct Answer:    

Mark Problem
39#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  How much energy is carycs,s*dh p:1ipz/mcv, w3 pu;ried by a photon with frequency 110 GHz?

Correct Answer:    

Mark Problem
40#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  How much energy is carried by a( +wz7b1 hx*pjaj3i xu photon with a frequency of 100,000 GHz?

Correct Answer:    

Mark Problem
41#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What frequency of electromagnetic radiation ew8bww 9 4t7rn blr0u/has energy $4.7 \times 10^{-25} \; J$?

Correct Answer:    

Mark Problem
42#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What frequency of electrov z(+j7)pwomyx:(:tn1jfa l ymagnetic radiation has an energy of 58.1 meV?

Correct Answer:    

Mark Problem
43#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What is the photon energeg me:jlp y3 b 5jkbaex7),6m)y of red light having wavelength 640 nm?

Correct Answer:    

Mark Problem
44#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  How much energy, in joules, is carriedc7jdu .c3r e1,,o5s g)dscc mc by a photon of wavelength 660 nm?

Correct Answer:    

Mark Problem
45#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  At what rate are photons emitted by a 50-W sodium vapor lamp? (Assume thw33tflx.m* j pat the lamp'stf mpl*w 3x3j. light is monochromatic and of wavelength $589 \; nm$.)

Correct Answer:    

Mark Problem
46#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A metal has a work functiod/iqthbl7f2 y1 sv.15pzuuk )n of 4.5 eV. Find the maximum kinetic energy of the photoelectrons ifyzd/kh. pqlb u)1its7vu2 51f the wavelength of light is 250 nm.

Correct Answer:    

Mark Problem
47#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  When light of wavelength 350 nm is incidex rjbz, /hr/u 0.x.zqnnt on a metal surface, the stopping potential of tx/xrzr,jq0 u /h. bn.zhe photoelectrons is 0.500 eV. What is the work function of the metal?

Correct Answer:    

Mark Problem
48#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  When light of wavelength 350 nm is incident onub,krtj nomon7;s 1r;+zlt)+n)i r*d a metal surface, the stopping potentiatrs7m;dr)bzn*t +ik+o;) l j1n ,u ronl of the photoelectrons is 0.500 eV. What is the threshold frequency?

Correct Answer:    

Mark Problem
49#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  When light of wavelength 350:dy b,2 ez mz8g*wrv f0zp-rx- nm is incident on a metal surface, the stopping potential of the photoerzfm 0p 8dzve y-x:g,2wrz*b-lectrons is 0.500 eV. What is the maximum kinetic energy of the electron?

Correct Answer:    

Mark Problem
50#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A monochromatic light is incident on the surface of a 7m/z h-8yqlbtau9u(5 4bqc ilmetal with work function 2.50 eV. If a 1.0-V stopping potential is required to make the photocurrent zero, what is t4 9 zbytla/q-muic 57 ul(hq8bhe wavelength of light?

Correct Answer:    

Mark Problem
51#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  If the scattering angle in Compton's scattering is 90e. What is the wavelengtxy s8er 0f*3m-uauos/ h shift0- s*yx8u/uae f rm3so?

Correct Answer:    

Mark Problem
52#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  X-rays of wavelength 0.22-dzh5qubim-1 4 de2 f qk;hha0 nm are scattered by a metal. The wavelength shift is observed 5 qqzk-;uhd 1ha22fied m-h4 bto be
$2.1 \times 10^{-12} \; m$ at a certain scattering angle measured relative to the incoming X-ray. What is the scattering angle?

Correct Answer:    

Mark Problem
53#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  X-rays with a wavelength of 0.00100 nm are sca 1ue3ex(sqru8; d s;hottered by free electrons at 130e. What is the kinetic energy of each recoil electrox sh (;81 e3o;qsreduun?

Correct Answer:    

Mark Problem
54#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What is the wavelength of the matter wave associated with a bcfp 5/ o6x-jcball of mass 0.50 kg moving with a speed obcp o cf5-6/jxf 25 m/s?

Correct Answer:    

Mark Problem
55#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What is the de Brogliei9kgj7y hz60d/h*bm t5 xdwc3 wavelength of a ball of mass 200 g moving with a speed of 30 mdh h mzi5wk3c*0y9d7btjx/g6 /s?

Correct Answer:    

Mark Problem
56#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What is the wavelength of the matter wave associated with an 7 rnkno np92(pelectron moving with a o npkn9pn( r27speed of $2.5 \times 10^7 \; m/s$?

Correct Answer:    

Mark Problem
57#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  An electron is accelerated through pi3 w;e-hld1c a potential difference of 150 V. What is its wavelength?e3ip-wh 1 cd;l

Correct Answer:    

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 its waq0e2sm 23ymcg* v6odf ivrz mj3u; 7m;velym2 v6go;emc03*ijmrsm dfz 2; 3u vq7ength?

Correct Answer:    

Mark Problem
59#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  An electron is accelentyg , q5un2ia9k3v ,grated by a potential difference of 100 V. What is its momentum iu92,qng 35 nvtag,k iyn $kg \cdot m/s$?

Correct Answer:    

Mark Problem
60#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  An electron is accelerated by a potential diffi:x/ ubf;wtvy1rh2)c 8km 1f1g xknb2erence of 100 V. What is its kinetixnt1mifb1bc x yw /h2;k8 :) 12uvfkrgc energy?

Correct Answer:    

Mark Problem
61#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A person of mass 50 kg has a wavelengm1df6 7,bqhszd.;kacc,(wb m th of $4.4 \times 10^{-36} \; m$ when running. How fast is she running?

Correct Answer:    

Mark Problem
62#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  An electron has a wavelength of 0.123 u;80pexxys6gw:u- s*w er;m xnm. What is its energy in eV? (This energy is - 8puxgw :6rmyxe;*we 0u;ssxnot in the relativistic region.)

Correct Answer:    

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

Correct Answer:    

Mark Problem
64#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The electron of a hydrogen atom makes a transition from the n = 5 state to th6y qcmwbhxw5 *783pay e n = 2 state. What is the wavelbqmy 38 a7wxwp*c y5h6ength of the emitted photon?

Correct Answer:    

Mark Problem
65#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The binding energy of the y wao-m9/ .tidn2;jruhydrogen atom in its ground state is -13.6 eV. What is the energynito /.2m9dua ;w- jry when it is in the n = 5 state?

Correct Answer:    

Mark Problem
66#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A hydrogen atom in the ground state absorbs a photon of energy 12.09 eV. Tl ./oi9zbets tk-+gp. o which state will the electron make a transitio+9 .pe./itlkozb gs- tn?

Correct Answer:    

Mark Problem
67#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What is the ionization energy of the neutral hydrop xyt3h f nou1u9 ed *c-f2t. j3sdl32khm1t6jgen atom?

Correct Answer:    

Mark Problem
68#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What is the ionization energy of sing*j6u oh y zbn8g)+/oa/u sqd5ely ionized helium?

Correct Answer:    

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 hydrogen at,b45x0ffc5ib ofmoh1om must

Correct Answer:    

Mark Problem
70#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  In state n = 1, the energy ofre z.u;m2nn( d the hydrogen atom is -13.58 eV. What is its energy in sr.m dz ;enun(2tate n = 2?

Correct Answer:    

Mark Problem
71#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The wavelength of a ruby laser is 694.3 nm. What is the energy differ sx4d7t8uk:ybence between the two energy states involved in las8ts:47ybux dker action?

Correct Answer:    

Mark Problem
72#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  An electron is moving about a single proton in an orbit characterized by n = 4. :oxzo6*h3b0khur2ylsv;el: gjwd 8 3 How many of the electron's de Broglie wavelengths fitx* 8ld vhh6 gzbr3:s 3 wok;yo:ju20el into the circumference of this orbit?

Correct Answer:    

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