Physics Unit25: Optical Instrument

1#

The length of time the shutter is open and the film is exposed in a camhc*c ,udfer(7lk k3hxvil;jp- nz6 z(*iyv ):era is determined by :-zy*f6x likvi)vd7p3 cre;hujn k,l* h(zc(the

A. shutter speed.

B. f-stop.

C. focusing.

D. none of the given answers

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The amount of light reaching the film in a camera is determs l39z yen.u1awci m /p+xs- w):apa)yined by the

A. shutter speed.

B. f-stop.

C. focusing.

D. none of the given answers

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In a single-lens reflex camera the lens-mwf6ijp b;- -ifilm distance may be varied by sliding the lens forward or backward with respect to the camera hop;wibj- 6mif- using. If, with such a camera, a fuzzy picture is obtained, this means that

A. the lens was too far from the film.

B. the lens was too close to the film.

C. too much light was incident on the film.

D. too little light was incident on the film.

E. none of the given answers

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A camera lens that covers the fi15e,qdl 6sktm.cbt 9r*z *ck1 p so)colm with a field of view that corresponds approximately to that od) m o5ssl9.1zk*kcqttep1 rcc*o,b 6 f normal vision is referred to as a

A. normal lens.

B. telephoto lens.

C. wide-angle lens.

D. zoom lens.

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A camera lens that acts like a telescope to m/g rk; ey n+7ogqitw2c*-fvi 5agnify images is referred to as a

A. normal lens.

B. telephoto lens.

C. wide-angle lens.

D. zoom lens.

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A camera lens that covers the film with4+ pbud ;r t5)5 h8.vkq inz;at0mptxp a wider field of view than that of the eye and through which 5+dmk 8t)50pp;x; tpia b t4v.qhrnzuobjects appear smaller is referred to as a

A. normal lens.

B. telephoto lens.

C. wide-angle lens.

D. zoom lens.

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In which of the followioq1 i a/niz6y:ng ways is a camera different from the human eye?

A. The camera always forms an inverted image, the eye does not.

B. The camera always forms a real image, the eye does not.

C. The camera utilizes a fixed focal length lens, the eye does not.

D. For the camera, the image magnification is greater than one, but for the eye the magnification is less than one.

E. A camera cannot focus on objects at infinity but the eye can.

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The principal refractiob g e-:h.tgkc7n of light by the eye occurs at the

A. cornea.

B. lens.

C. retina.

D. iris.

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9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The closest distance at which an z.nq(51ol ss.(gg/m3u:p ws4 e,) ohsvafvl ieye can see objects clearly is

A. the near point.

B. the far point.

C. nearsightedness.

D. farsightedness.

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10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The farthest distance at which a)18(8 cs1s ihxh ,9wndavndfv8wa/ y1-ohk bpn eye can see objects clearly is

A. the near point.

B. the far point.

C. nearsightedness.

D. farsightedness.

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11#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

If a person's eyeball is too long from front to bacpkm3ywwxk;2 c6-rzpsnk: v5 2 k, the person is likely to suffw ks2vw;ykcz3knx2r 6 mp:5-per from

A. spherical aberration.

B. nearsightedness.

C. farsightedness.

D. astigmatism.

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12#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Nearsightedness can usuae/ rc 62 4oacvzg3j )gun4qcv4lly be corrected with

A. converging lenses.

B. diverging lenses.

C. achromatic lenses.

D. cylindrical lenses.

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13#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

If the human eyeball is too long from front to back,w5c+4 cdn6gz v this gives rise to a vision defect that can be correctcz4 cw n5dv6+ged by using

A. convex meniscus eyeglasses.

B. concave meniscus eyeglasses.

C. cylindrical eyeglasses.

D. contact lenses, but no ordinary lenses.

E. shaded glasses (i.e., something that will cause the iris to dilate more).

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14#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

If a person's eyeball is too short from front to ujhcg5qf;l+ zr-t n 2 p0+ahm)back, the person is likely to suffer f0u)5cf-ml 2 pgt rhqjn++za; hrom

A. astigmatism.

B. spherical aberration.

C. farsightedness.

D. nearsightedness.

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15#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Farsightedness can usually ;u ge5-kp,dp bbe corrected with

A. cylindrical lenses.

B. achromatic lenses.

C. diverging lenses.

D. converging lenses.

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16#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

If the human eyeball is too short from front to back, this givey.9gaip :dqvg 1c p*w:s rise to a vision defect that can be corrected by us.iadqg pcw*gpy:91 :ving

A. convex meniscus eyeglasses.

B. concave meniscus eyeglasses.

C. cylindrical eyeglasses.

D. contact lenses, but no ordinary lenses.

E. shaded glasses (i.e., something that will cause the iris to dilate more).

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17#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What type of lens is a magnifying glas-y(ta :fwp k.9m;efuj s?

A. converging

B. diverging

C. spherical

D. cylindrical

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18#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An important reason for using a very large diameter objective tbxacgb m67+c 5rw7q/a g-q i(in an astronomical ter5i6/ a(cqtbamb-xc+g7q 7wglescope is

A. to increase the magnification.

B. to increase the resolution.

C. to form a virtual image, which is easier to look at.

D. to increase the width of the field of view.

E. to increase the depth of the field of view.

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19#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Consider the image formed by a refracting telescopeg 2.31lsc gwlhs j7:zy. Suppose an opaque screen is placed in front of the lower half of the objective lens. What effect will thisyjl 27.wg1 sz:l g3hcs have?

A. The top half of the image will be blacked out.

B. The lower half of the image will be blacked out.

C. The entire image will be blacked out, since the entire lens is needed to form an image.

D. The image will appear as it would if the objective were not blocked, but it will be dimmer.

E. There will be no noticeable difference in the appearance of the image with the objective partially blocked or not.

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20#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Assuming the film used has uniform sensitivity throughout the visible spevh q79a 9cwq4qctrum, in which of the following cases would you be able to best distinguish between two closely spaced stars? (The lens referred to is the objec9vh qcq47 9qawtive lens of the telescope used.)

A. use a large lens and blue light

B. use a large lens and red light

C. use a small lens and blue light

D. use a small lens and red light

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21#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A refracting telescope haemsppw3h6rfb 8x-l;) s a magnification $m$. If the objective focal length is doubled and the eyepiece focal length is halved, what is the new magnification?

A. $4 \; m$

B. $2 \; m$

C. $m/2$

D. $m/4$

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22#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

With what color light would you expect to be able to see the greatest detaiy:*owi o0p-tlh/qt4k l when using a mich4to:ql/t- 0 owi p*ykroscope?

A. red, because of its long wavelength

B. yellow, because of its right wavelength

C. blue, because of its shorter wavelength

D. Color does not matter.

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23#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Spherical lenses suf8f4 pz2u*sk.,+ uu yxtotb/wsfer from

A. both spherical and chromatic aberration.

B. spherical aberration, but not chromatic aberration.

C. chromatic aberration, but not spherical aberration.

D. neither spherical nor chromatic aberration.

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24#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Spherical mirrors suffer frkd5 zfq)wcix( w8 v900ne3x8ho8tk seom

A. both spherical and chromatic aberration.

B. spherical aberration, but not chromatic aberration.

C. chromatic aberration, but not spherical aberration.

D. neither spherical nor chromatic aberration.

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25#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The resolving power of a microscope refers to the ability to .55-r2zg- i3vh c.j ltrwbvbk

A. distinguish objects of different colors.

B. form clear images of two points that are very close together.

C. form a very large image.

D. form a very bright image.

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26#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

If the diameter of a rada.,i n+rw9c+c yr gq;ddr dish is doubled, what happens to its resolving power assuming that all other factors remain unchanged? Its re cr idn;dwc.y+gr9+q, solving power

A. quadruples.

B. doubles.

C. halves.

D. is reduced to one-quarter its original value.

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27#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A near-sighted person has a far point oft+rw3ngh7 yg; 18 cm. What lens (in diopters) will allow this person to see dh g+tw3grn;y 7istant objects clearly?

A. +5.6 D

B. -5.6 D

C. +0.056 D

D. -0.056 D

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28#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A person cannot see clearly objects more than 70.0 cm away. What power of lens ihoy;lzn w, fz;ac,x 6fc9b))should be prescribed if the glass is to be worn 1.00 cm in f; azli,)fh6fo y )cnc;zwx,9bront of the eye?

A. $1.45 \; D$

B. $-1.45 \; D$

C. $0.0145 \; D$

D. $-0.0145 \; D$

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29#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A nearsighted person wears glasses whose lenses have power of -07;f xxz27/j 4)d ltco,ntf rxt.15 D. What is the person's far point if th 7czxt 2jxo 7rfn),/tlf4xtd;e glasses are very close to the eyes?

A. $1.5 \; m$

B. $3.3 \; m$

C. $6.0 \; m$

D. $6.7 \; m$

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30#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What power lens is needed to correct for farsightedness where the uncorrectex.auqw*+yo3/4nw+g et,v dvp d near qyup w g /tnev*vd.x,+w+3oa 4point is 75 cm?

A. +2.7 D

B. -2.7 D

C. +5.3 D

D. -5.3 D

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31#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The near point of a farsighted person is 100 cm. She places recl v-u d*z7js1ading glasses close to her eyes, and with t* -vsu 7ldcjz1hem she can comfortably read a newspaper at a distance of 25 cm. What lens power is required?

A. +2.5 D

B. +3.0 D

C. +3.2 D

D. -2.0 D

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32#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A farsighted person can read a newspaper held 25 c62(xwfj4ddqgo j:u. j m from his eyes, if he wears glasses oxd : do4fj( j6.jg2qwuf
+3.33 diopters. What is this person's near point?

A. $4.2 \; cm$

B. $25 \; cm$

C. $31 \; cm$

D. $1.5 \; m$

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33#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A magnifying lens has a focal length of 10 cm. A per6 kt .9mw8gurqson has a near point of 25 cm. What is the magnification of the lens for that person wr68wu q9m.kgthen their eyes are focused at infinity?

A. 1.5

B. 2.5

C. 3.5

D. 4.5

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34#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A magnifying lens has a focal length of 10m(w,y: nk 5 ksbsu cqo2;9izy* cm. A person has a near point of 25 cm. What is the magnification of the lens for that person when their eyes are focused at their near p nyw5 qsum2kzb;:i o(ks c9*y,oint?

A. 1.5

B. 2.5

C. 3.5

D. 4.5

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35#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A magnifying glass has a focal length of 7.0 cm. What is the 2fy 0p; .nfyknmagnification if the image is viewed by a relaxed eye?k2f p0fyyn n;.

A. 1.6

B. 2.6

C. 3.6

D. 4.6

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36#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A person uses a converging lens ofp:3y u)f 7e ead1zb81lno pce, focal length 5.0 cm as a magnifying glass. What is the 8 11)enza,pbo:ee 7dlp3c fuymaximum possible magnification?

A. 4.0

B. 5.0

C. 6.0

D. 7.0

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37#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A person uses a converging lens of focal length 5.0 cm as a magnifyivb5ka0hp:x 0zbe1 2vxng glass. What is the magnification if the he: 0 pax0v5kvb1 z2bxperson's eye is relaxed?

A. 4.0

B. 5.0

C. 6.0

D. 7.0

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38#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

You have available lenses of focal lengthsnjha;9217hl 1 y*(hec mod 8t yy.ulri 2.0 cm, 4.0 cm, 8.0 cm, and 16.0 cm. If you were to use any two of these lenses to build a telescope, what is theh y 8(n1cry1dieuo2jl.9 ;ha*lmh7ty maximum magnification you could achieve?

A. 2.0

B. 4.0

C. 6.0

D. 8.0

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39#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

You have available lenses of focal lengths 45c9so4 v/ hp kwy-y(db0fgi s2.0 cm, 4.0 cm, 8.0 cm, and 16 cm. If you were to use any two of these lenses to build a telescope, what is the lens separation for the maximum magnif04-yi59y4 dk f/og(v shcspwbication telescope?

A. $10.0 \; cm$

B. $12.0 \; cm$

C. $18.0 \; cm$

D. $24.0 \; cm$

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40#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The objective of a telesd/ *hhdh,r lha( cs(3mcope has a focal length of 200 cm and its eyepiece has a focal *l(/d3ar hs,hcd hh(mlength of
1.1 cm. What is the magnification of this telescope when viewing an object at infinity?

A. 20

B. 0.0050

C. 200

D. none of the given answers

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41#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A student constructs an astronomical telescope with ai2x* t96eo;iqp pghv - magnification of 10. If the telescope has a converging let9-gohvxi2;p* 6ep q ins of focal length 50 cm, what is the focal length of the eyepiece?

A. $2.5 \; cm$

B. $5.0 \; cm$

C. $10 \; cm$

D. $25 \; cm$

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42#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A student constructs an astronomical telescj/jxdz a lul.h 1k5-0mope with a magnification of 10. If the telescope hh/ uj5zd0 xkjlml a-.1as a converging lens of focal length 50 cm, what is the resulting length of the telescope?

A. $53 \; cm$

B. $55 \; cm$

C. $60 \; cm$

D. $75 \; cm$

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43#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A person is designing a 10X telescope. If the telep1g ,jf z0n4vbscope is limited to a length ofjpzbv0 n, fg41 20 cm, what is the approximate focal length of the objective?

A. $16 \; cm$

B. $17 \; cm$

C. $18 \; cm$

D. $19 \; cm$

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44#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A microscope has an objective lens of focal length 1.4 mmolg157jb) b rbyi /3rq(b(uaw and an eyepiece of focal length 20 mm, adjusted for minlja15()yg ( 7r bbbo/qiuw3 brimum eyestrain. A blood sample is placed 1.5 mm from the objective. How far apart are the lenses?

A. $20 \; mm$

B. $21 \; mm$

C. $23 \; mm$

D. $41 \; mm$

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45#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A microscope has an objective lens of f7a:f.oi tsn )1gp ldu(ocal length 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimum eyestrain. A blood sample ia.p:i 7)1lo (g nsftuds placed 1.5 mm from the objective. What is the overall magnification?

A. 18

B. 37

C. 180

D. 370

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46#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A compound microscope has an objective with a focal length of 3.00 mm and:clno0q j4:js8l*.0h) obcodz b mnk7 an eyepiece of focal length 6.00 cm. If the two lensb z c.nqlcolj nmd087jo )oh4b:0*k: ses are separated by 40.0 cm, what is the total magnification?

A. 27.8

B. 55.6

C. 278

D. 556

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47#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A compound microscope has a 18-cm barrel +a - bn7cv+uwsand an objective with a focal length of 8.0 mm. What is the focal length of the eyepiece to give a total magnification7nb-+s va wuc+ of 240?

A. $0.13 \; cm$

B. $1.5 \; cm$

C. $1.9 \; cm$

D. $2.3 \; cm$

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48#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A binary star system de;8 kyh*6tmpvee:ve5yvp jg+s( q, 4 in the constellation Orion has an angular separation of 10-5 rad. If the wavelength of the light from the system is 500 nm, what is the smallest aperture (diameter) telescope that eyy5hd:6jq4t s;kgp ee,mpv*8 ev (v+can just resolve the two stars?

A. $0.50 \; cm$

B. $0.61 \; cm$

C. $5.0 \; cm$

D. $6.1 \; cm$

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49#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A compound microscope is designl*ssaq(gwu1uc sz5 39ed to resolve objects which are 0.010 mm apart. If the focal length of the objective is 4.0 cm and the wavelength of light used is 550 nm, what isw1(z9 lguc 5u*qs 3sas the diameter of the objective?

A. $0.27 \; mm$

B. $0.54 \; mm$

C. $2.7 \; mm$

D. $5.4 \; mm$

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50#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The pupil of a person's eye changes from a diameter of 3.5 mm to 1.5 mm acw,u y9ln cl/b * qr8q/lb0/jns the illuminatiocn0/yl lu w, c8qj9bl/b* rq/nn is increased. By what factor does the minimum angle of resolution change?

A. 0.43

B. 0.65

C. 2.0

D. 2.3

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51#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The 2.4-m reflecting Hubble Space Telescope has been place/or-zgefsn (0k3(lz s d into Earth orbit by the space shuttle. What angular resolution could this telescope achieve if the wavelength is 5e r3l(kz-/0nz gf( sso00 nm?

A. $2.5 \times 10^{-7} \; rad$

B. $3.6 \times 10^{-7} \; rad$

C. $5.7 \times 10^{-7} \; rad$

D. $6.8 \times 10^{-7} \; rad$

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