Physics Unit25: Optical Instruments - 51fly国际课程 (51fly.win)

1#

The length of time the shutter is open and the film if9d kfgkl gl3.4 x w2:dydj1z8s exposed in a camera is determinedgjkl.d:f 8k g2wl 34dxy1fz9 d by 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 detereq/ezok g35 6wmined 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-film distance may be varied by sliding 24t urzvnid( fab.(h ,ch(s4dthe lens forward or backward with respect to the camera huh(a,srdf4dchz 2v. tni4(( b ousing. 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 film with a field of view that co 57ppc:o jr9jwrresponds approximately to thatj 5w7rc9p pj:o of 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 tel1jddzqdj2 4p +e; lzm3escope to magnify 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 cob xme)a,/+vt,o)(pazxkjucbl . 2xn (vers the film with a wider field of view than that of the eye and through which objects appear smaller is referr2mx,j(x k (xb)l.zb aa+ p )/cvo,eunted 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 following ways is a camera different f -hl.qz mn:;ac*r7ba+ p)ds 9uyunsf:rom 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 refraction of light by the eye q vkmz:vns)3:i1 vfott;4) 1hs4 ukp loccurs 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 eye c6zo7 *4)rdj ekfy1q zian 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 an eye can see objects clearly is1. hs6rpzb1vd 7 8 kkvvo),fiy

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 frojjyp 5mvw;6kml.z4m 2m front to back, the person is likely to suffer frommm5vyj4 z ;kl wjp.m62

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 um9i 6zkl:djp2rs *o. msually 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, this giv*)q xw*rw; ndges rise to a vision defect that can be cog* *qn;) wrdxwrrected 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 h9,i:nc4 w)a/wxz xap short from front to back, the person is likely to sufh9xwzn ,x)iaw /4:apcfer from

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 usu )v3cdn;m3kr 7mt1q mpcq-c9eally be 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 tohp-h6vl7vc )m0hut ud mpsa+8/ zv7a*o short from front to back, this gives rise to a vision defect that can be 8 6p hma 77/d*0-svc +m)hlhuaptzv uvcorrected 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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17#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What type of lens is a magnc bva )bx d:lv0;8- 0er2snbddifying glass?

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 wj4w6b )n, *; sg),eymdd gcxjusing a very large diameter objective in an astronomical teles;,engd ,6xgycmj*ds4)wbw) jcope 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 fo0f *yat4psfins *bg6 z0 iy-mw-0xvp 1rmed by a refracting telescope. Suppose an opaque screen is placed in ws p04 fagt6f1y*yn-mi0xib0 *zsp-vfront of the lower half of the objective lens. What effect will this 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 sensyx7 rad,. 4wpzf)w, db x*mi6sitivity throughout the visible spectrum, in which of the following cases would you be able to best distinguish between two closely spaced stars? (The lens referred to is the objec fizxyw pad, r7b.sdx,)4mw6*tive 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 has a magnif:; iya5cj tdk5ication $m$. 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 /srm:fa vk7r +vhh0 v3detail when using a micross/fvv0:hkv73 rrham+ cope?

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 suffg zusbk3d-*p78xc2 eier 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 q-;omcuo g)kpu7i 9y;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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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 j-qbe hxd*8e: to

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 radar dish is doubled, what happens to its resolving po rpv89+ h olb96do fy3zj)h m yr39yom+,6mmmgwer assuming that all other factors remain unchanged? Its resolving poyy 9b jr,r3 vlmhyp3fo+og z8m9d 6 )hmm9o+m6wer

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 5,5bnwxwvd0q far point of 18 cm. What lens (in diopters) will alln,xq5 ww 5bv0dow this person to see distant 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 01ltli q)ydgg.x)u b9 70.0 cm away. What power of lens should be prescribed if the glass is to be worn 1.00 cm in giy g9bl) l. 1udqxt0)front 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 powe q08nso46c uhdr of -0.15 D. What is the person's far point if the glasses are very 08 6qd4n chosuclose 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 cnz0hhe3 1- lcxorrect for farsightedness where the uncorrected near point hlz1x3-h0 cenis 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 readd6dt)pr xj sqv9)2/jh2 qag,du1 j,iring glasses close to her eyes, and wit) 2tsd dag1xrpdhv/uq92 ji,,6jj)rqh them 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 newspu/-cypjqy+f73- e (p ca+ ; o.brigwdpaper held 25 cm from his eyes, if he wears glasse;pgbpfae-w / j -q ( c+ci3opu.y+yd7rs of
+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 person has a ne.ut;a2p3 p*goi va2 huar point of 25 cm. What is the magnification of the lens for that person when their eyes are fopt uh;vi* 2o3g.p 2uaacused 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 10 cm. A +e peov 7+cc6ef+cmzwt/k*d 5person has a near point of 25 cm. What is the magnification of the lens for that person when th+ *e6m+5dz/w f7tcek pecvco+eir eyes are focused at their near point?

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 4adz3ov05yl2j// yod; lqu/ jg c-vds of 7.0 cm. What is the magnification if the image is viewed by a relagl/djl3u y4osq0jo/vd z v;-cy52d /axed eye?

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 of focal length 5.0 cdwq 6a5)nf/ln lo2ek33vb, gc m as a magnifying glass. What is the ma 36 knfad eq,o/) vgnl3wbl25cximum 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 convex4pbm,v4oef d+p7.y *w ow3 nurging lens of focal length 5.0 cm as a magnifying glass. What owye7.3n 4,d*u4wbx foppmv +is the magnification if the person'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 lengths 2.0 cm, 4,j2wmjv-; e7gxo lkh):a y:ls.0 cm, 8.0 cm, and 16.0 cm. If you were to use any two ,:lmk -aylejwv 2:7;og)j hxs of these lenses to build a telescope, what is the 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 2.0 cm, 4.0 cm, 8.0 cm/otwl;m.(b8 9iom bz f, 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 magnification teles; o. m8wotlf(b9/ zbimcope?

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 telescope has a focal length of 200 cm and its eyepiece hh3is*7v 4fy zvas a focal lvi74yfhv z* s3ength 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 a magnification of 10.d)(7i/8u h fd5j lvnwz If the telescope has a converging lens of focal length/)8iw(5uvnd z7fdl jh 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 m 80 zyls:5 prwzz5-yu mlaxn(i..lq+telescope with a magnification of 10. If the telescope has a converging lens of focal length 50 cm, what is tam5(plryswl8 .5nl yuzq +0zzx: m .i-he 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 telescope is limited to a length od ml-td69e ha- o3ng+qf 20 cm, what is the approx9-amg 3l+qtonh-6dd e imate 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 fo,ql4ryc6h 5n ,o kynq.md ou/4cal length 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimum eyestrain. A blood sample is placed 1.5 mm from the objective. How far apart are the lensm h. 6 4,qyoqny45or,dunl c/kes?

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 fo(+. b eiadh4+buswjkzs gq5-:cal length 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimum eyestrain. A blood sample is placed 1.5 mm fk+qdb izhe s5:ja -+4.s(bwgurom 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 anli g(c7myt-)y d an eyepiece of focal length 6.00 cm. If the two lenses are separated by 40m( y7t)iy- clg.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 microscopnmjfxx2z( h70 e has a 18-cm barrel and an objective with a focal length of 8.0 mm. What is the f (xmf2hzn7 jx0ocal length of the eyepiece to give a total magnification 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 in the constellation* zhre s;5lh 6zjth-*f Orion has an angular separation of 10-5 raf*- t;h5 j*h6lzzsehr d. If the wavelength of the light from the system is 500 nm, what is the smallest aperture (diameter) telescope that 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 designed to resolve objects zy1m 5v-xa8yu which are 0.010 mm apart. yx yza5v1mu -8If the focal length of the objective is 4.0 cm and the wavelength of light used is 550 nm, what is 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 asncen9,rro:: s the illumination is increased. By what factor does the minimum angle of resoe9:rnr :,s ocnlution 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 placa0vt:;j, x co3 xhyv.bed into Earth orbit by the space shuttle. Whavx 0a.: 3bc,hjx oy;tvt angular resolution could this telescope achieve if the wavelength is 500 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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