Physics Unit25: Optical Instruments - 无忧得胜-网上国际课程 (5edu.win)

1#

The length of time the shutter is ju ghj*187* ky(5am )y7ly/(xu4vtc j egnopcopen and the film is exposed in a camera is determined by the juj1(hvmcy loeg/cty p(5 x 8gj7n**4ka)7u y

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 determiu fx;7 4q w+ky2knlzph1o, ijn jp24b8ned 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 :fb1epez9 3oh w bh1* u,t en/)htm2umvaried by sliding the lhtfwb h,: eez2bmh)e1t/*n 3m1up9o uens forward or backward with respect to the camera housing. 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 cover,fe f7n7vkhto 1vma:8seri j76x 3d w5s the film with a field of view that corresponds approximately to that of normal visiwr 5 enffm,v87oj x:771 6h3etkdisa von 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 actip mki w6ln.tu1i q0)gr:(tf(s like a telescope 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 covers the film with a wider fielhlp:* *pwiyb 9d of view than that of the eye and through which obje9lp** hbiy wp:cts 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 following ways is a ku(d86n *orvkcamera 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 refraction of light by the eye o2pr7g r-efe :55 zx xk)qucdnra48ly;ccurs 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 mqqw7g am96j 6eye 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 aemxx. pky )jn;.(o8 oir 7qd*rn 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 fron fh/v.y 82d+zzjq4tbw6v cg+rt to back, the person is likely to suf.6d +t vvcjf+q8w/by hrzg2z4fer 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 usually f; + +ex -fp-r7cmmbdsbe 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 gives rise to ahw +xq,,/7ohyjl bs r( vision defect that can be corrected by (sqy,rxb7o ,j/h hlw+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 back, the person isps5)v t.l3ab2 gey.*x bij(t9 iuc ;ka likely to suffer from(iye.j3ti.bltb5 v *c2)xa up;ka9gs

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 us g+ 4xhtqi(rj)ually 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 too short from front to bas;t:q:qsymwm.f5no 4 q8ie*q ck, this gives rise to a vision defect that can be corrs5feiqmn; q8w .*ot :4y:m sqqected 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 magnifying glaslv0z8c u64 zsm.t yucygu/:9ds?

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 lytj/b0 :zfwfz+ ie9f2arge diameter objective in an astronomical teles+z:bye 9if wffz t0/2jcope 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 telescope. Suppose an opaque tbq-1 w39,exl .u;ib,b bnyzbscreen is placed in front of the lower half of the objective lens. What effect will this h1 y -ql;zbw,nbebb,bxuti39.ave?

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 th o,l6;9b;(mycp7d l-es esohb e 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 thes9de o7 lb6;-y(eso;hml cbp, objective 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 hasu nug lyj7i :-3wtbd6tt01h+h 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 lightg .v)pwur3zpks3ft*,u5q ) j n would you expect to be able to see the greatest detail when using a microscopenzfu)j*vw p g33,5u .)qrkspt?

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 suffer fr4j; hl s4shq.xom

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 frof)z7k/q yn jwhp 8::3,lmz7iyp x sh4rm

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 abilityzp +hbx6+m5 15m ypgtx 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 douu4fdh0n3 w.vya f +h rrp+))/qp0y xuwbled, what happens to its resolving power assuming that all other factors remain unchu0f h+ay/ )4n0p 3 rfx q+ywrdu.hvwp)anged? Its resolving 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 of 18 ccpw p;;py)g:pk +. w7pqzs0cpm. What lens (in diopters) will allow this person ; ;pyc7pwp 0p:kpgc s)zp+.wqto 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 clearq/lv e qy6la;ng6:7agly objects more than 70.0 cm away. What power of lens should be prescri e/qaa ;6l qn6gl:vyg7bed if the glass is to be worn 1.00 cm in 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 po:fco -6dthz6do pwk,+eqz-kd7-k z3a wer of -0.15 D. What is the person's far point i-kow k66, -a+-dk 7oqdh3tpfe c: zdzzf the 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 uncor k;ve zi4t,2x0wl 7mamrected near pkewm v z;0la427,ixmt oint 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 readingej hvs5s6m x t:x9+2bd glasses close to her eyes, and with them she can comfortably read dssvx me h5+tx:62b9ja 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 ne7rxkyigv*vo1p 8mg/o:vz:+ gwspaper held 25 cm from his eyes, if he wears glasim xr /1:kgg8o vpz+o*y:vgv7ses 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 -z;ns )m vtoadb-;j b+10 cm. A person has a near point of 25 cm. What is the magnification of the lens for that person when their eyes are foovnt;abdj+-)m;z b s -cused 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 person has a near po*u7*vk xk a7mvint of 25 cm. Whux *mak* 7vv7kat is the magnification of the lens for that person when their 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 of 7.0 cm. Wharbo8guj5 i1 l0t is the magnification if the image is viewed bygl 0o1 ib5r8uj a relaxed 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 mo9txd3 ) wqy4focal length 5.0 cm as a magnifying glass. Whm9txq 4w3o y)dat is the maximum 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 magnifya (mjt)- vnr(ling glass. What isln(tjv(r-m)a 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, c:w/(,ve v : mzm6c5gcywfkn4t.1q f w4.0 cm, 8.0 cm, and 16.0 cm. If you were to use a(wkc65 c1me4f.ztgy/:: m nv,wvfc wqny two 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 foca56sv)hebyn; c9-krp .akji:0,tm n cql lengths 2.0 cm, 4.0 cm, 8.0 cm, and 16 cm. If you were to use ant5: .hca i k vy6ep k)c9rns,-;b0jnqmy two of these lenses to build a telescope, what is the lens separation for the maximum magnification 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 tele7i-bgg;zhrmk7e .y e2scope has a focal length of 200 cm and its eyepiece has a focal le z7rge7km2-gh i;ybe .ngth 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 magnifi aah1t z ;5dk 9kv/ks6hisck,-cation of 10. If the d5 a za69kts-/sh hk; cv,1kiktelescope has a converging lens 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 telescope with a magnification of 10lqfi g)t1(8kv . If the telescope has a converging lens of focal length 50 cm, what is the resulting lev8 )(f lqtikg1ngth 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 0m8sn.h,sfd ah-a.xw to a length of 20 cm, what is the approximate focasa8a0,m.s f dhh .nwx-l 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 mm and an eyepiece izcw4r:1o8- sa)x: linu/ txe of focal length 20 mm, adjus:eiw/x84 )1 tozxir-n:c lausted for minimum 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 o0. vcxaow2 zveg,9js :f focal length 1.4 mm and an eyepiece of focal lengthc9js: evw 0a2o.x,gzv 20 mm, adjusted for minimum eyestrain. A blood sample is 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 fmeemx0e vgt3; 8m.w/ and an eyepiece of focal length 6.00 cm. If the two lenses are separated by 40.0 cm, what is the total magnifim0.evmxwm8/;e g 3tfecation?

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 18wnwwf+-,:1h s dztb)y -cm barrel and an objective with a focal length of 8.0 mm. What is the focal lengtht+nzw:1 df,wy wsb-h) 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 Orion has an angular separat omhvhi5s840,jwnz+cds,,r oion of 10-5 rad. If the wavelength of the light fro,wz, vmo8r nhc 5od sh0+ji4s,m 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 which are 0.01f 6;g /zxqxrp k axn; ;rr-mzbpreh1::pit 0(*0 mm apart. If the focal lengz;;r x(ar b/-61x *x tr:k0q:h pezi gmrfppn;th 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,rud;g7 lyoi96vo rd3 mm to 1.5 mm as the ill, o3d dg9yo7 ulrr6i;vumination 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 h .xau qly(wes(obc7q1iq*emk,j u** (as been placed into Earth orbit by the space shuttle. What angular resolution could this telescope ac i. ub*e*xcywk*7u1olj(eaq,s q(mq(hieve 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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