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

1#

The length of time the shutter is open and the film is exq5pkkk v; 6vp2posed in a camera is dete 26pkqk v5vp;krmined 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 ;ti l5yjt5j c,ya,2s9fpkrz1in a camera is determined 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 8n l5ulk d:eq +skk4xih2u*/v the lens-film distance may be varied by sliding the lens forward or backward with respect to the camera housing. If, with such a c:xuvlldskn28quk k*45 +ih e/amera, 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 foxee2lz8+q7 ailm with a field of view that corresponds approximately to that of normal vis2l+eazeo qx78ion 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 v9+z pagy6a j yrw.1x2a 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,dezu vke90 fug )yve-ah8.h2 film with a wider field of view than that of the eye and through which objects appear smaller i .v0uv zu82hay-hgd9ee,k f e)s 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 camera different from the human eej)h 375eci* z taeebnlds1ra:4t2 4yye?

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 refractiopetb7*b 6xp.c n 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 eye can see objects clearqb:o,q,0 mosb ly 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 poe ; a+h3mf3rt5mv-e 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 b4onpkbrxo9)kxp37 f 7ack, the person is likely to suffer fpr4xn3 7kk) bfoo 79pxrom

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 bv783 9 vntqwtga8 k2hve 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 iita,j0/td uwkd8z +w-h ,zjs3s too long from front to back, this gives rise to a vision defect that can be corrected by usijz t ukd ,0/td3wj+sha, -8zwing

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 is ia lk-b+b35hn likely to suffer from53bk iabh+ n-l

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 be correct70/u;d 2vnzfzb (ird sed 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,3b8f* lvj(2 uux2;2unq1qsi amac gr. this gives rise to a vision defect that can be b vijx(12ugm ;2cu aa.s nlf8q2ruq*3corrected 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 glas8 rl3vyjjg7 .vava9h 1s?

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 pdmtjf3u 6k5-wsh + o-4 a1qecj+pdk4diameter objective in an astronomical telescampuohd 46j4q3wjt s+-1 d-cepf+ 5kkope 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 refractin5ji02b ddf 3vyg telescope. Suppose an opaque screen is placed in fron0 25vdfjy3 idbt 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 us6e zm,r -+r)l9c a30kdzkf bnbed has uniform sensitivity throughout the visible spectrum, in which of the following cases would you be able to best distinguish between two closely spaced stars? (The lens )cmf 9e6z 0+,rnrzbk3bda-lk referred to is the 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 has a6 q oxacil j:ypp6.w/1 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 detaid;rc ;h2e jly3bu-l4 tl when using a microsl 32leu-;ytdb4cj;rh 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 suffer 6vm bhp 9oh9 h((ak-s:qsgnj6 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 fro0. yd n-vw3eram

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(rtni3 o n:zf2. yxi5 a4zakd- a microscope refers to the ability 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 resolv+ - ihot:l *5))5fpeysyd2/gn nlf ndping power assuming that all other factors remain unchanged? Its restp-) f+:d) 5sy2edn fhln lgno/i*5ypolving 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 cm. What lens (in di44ii kfn6 -vi;ievis;opters) will allow this person to se vifei -; n4;is46ivkie 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 ob z:wch 27af4bc 9h9rlnjects more than 70.0 cm away. What power of lens should be prescribed if the glass is to be worn 1.00 cm in frfnh c4b 9hlacz7r w29:ont 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 8x-yf8amr; qw/n:wxg8ox)52 l lr/egg)vd ychave power of -0.15 D. What is the person's far pog2n5g8-8:lxrxg)lywfd/8w xycm ro q;e/ va)int if 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 farsightedgb5il)jds:,a 4x 0 c ne:tpom8ness where the uncorrected near p:bi,) l4 5gd0csopmaejn8t:xoint 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 reading - 3jrmyxf;jsu5w/h7sglasses close to her eyes, and with them she can comfortably read a newspaper at a distance of ;s7/wjxhyrjs fum-3 525 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 x(g -+yoa-bipcan read a newspaper held 25 cm from his eyes, if he wears glass-io-+ab gpy( xes 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 zj-x uh8:,r xb10 cm. A person has a near point of 25 cm. What is the magnification of the lens for that person whe8 z-: bhx,xjurn 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 10 cm. A p1nvi zyub l4pk ,erqv3kh( /w84s s3b(erson 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 kyrk1u vn(/8 pvs(wh4blbi3z eqs,34 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 hpk ;*mb97vnpj+g( yr gas a focal length of 7.0 cm. What is the magnification if the image is viejyp 9v7 k (rgnmb+g;p*wed by 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 focal length 5.0 cm as a magnifying glassg4ff;crtq- vny3hj )5. What is the maximum possible magnificatio n;cj y4f)qvf -hgrt35n?

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 5.0b22 6bt(av hit qbfhb-j6p/*j cm as a magnifying glass. What f 6pb(hjtib2t2 bj*a/6hq -vbis 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, 4.0 cm, 8.0 cm, and 16.0 si7 qe1*+/pda 50shbwpw bf7ff7a)yecm. If you were to use any two of these lenses t/) *ewfwaa e77 y+ sffsd p1b0qbp7ih5o 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 focaltje oy8lqw4.xou 87 2o lengths 2.0 cm, 4.0 cm, 8.0 cm, and 16 cm. If you were to use any two of these lenses to build a telescope, t4 j8yx2qeo l8w 7ou.owhat 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 telescope has a focal length of 20mw h l gb)a 88s3nf;j:yu(i+74q7xnm* i uauuw0 cm and its eyepiece has a fwla:7 a;gny (j78 iw bu*sq8mxn3 h)umuufi+4ocal length 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 teleso1d9l7e e)b jecope with a magnification of 10. If the telescope has a converging lens of e o)9ede jb71lfocal 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 au6i(1 uxew*r5n7v trc3 pez;j magnification of 10. If the telescope has a converging lens of focal lejitx p1v(eu wu;z756cer3n r*ngth 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 tele;u omy-/e11 pkzgby: tscope is limited to a length of 20 cm, what is the approximate focal lengt typuy;k/1 m:g1z-oebh 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 lejagm,lirt3 e r-ny hr84p34j,ngth 1.4 mm and an eyepiece of focal length 20 mm, adjusted fora,ihrjt48p-e gly3nr,jr 4m3 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 lz4 mg fnsep vy;;0*ft6ens of focal length 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimum eyestrain. A 0nytf*6 g4mezv;pf;sblood 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 ( ;xg92h0xvidngkaq9t o sl0* length of 3.00 mm and an eyepiece of focal length 6.00 cm. If the two lenses are separated by 40.0 cm, whatstxv2 0ki *lq ha;odxggn90 9( 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 and an obj-jcn5hnu 5p :yective with a focal length of 8.0 mm. What is the focal length of the eyepi5h5nn-upy j :cece 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 hasn /* udo6g-/cqi/ wqgo 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 //n6qwogg * ci- qd/oucan 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 obje 6endo9t2q9xm cts 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 9 mdnqetx629 ois 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 1,95;pd5 1 em3cp*cfx4b,q gkdveyin twrf6 c changes from a diameter of 3.5 mm to 1.5 mm as the ilbt p*n;9 , xre,ckmdvqwyd1 gf3ec1 54pfc65i lumination 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 4nz*e7thqk zl/r:t c4f.-jqphas been placed into Earth orbit by the space shuttle. What angular resolution could this telescope achieve ife znr jtl-z:44 /qkqcfp*.7ht 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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