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

1#

The length of time the shutter is open and the film ibnejo.4c1 n s0s exposed in a camera is determi1s.bjo nc4 0nened 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 det6y0r fau7*-eov g9;w db5 qansermined 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 max4ff6qk7 7f myy be varied by sliding the lens forward or backward with respem7 qxkf f67yf4ct 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 covers the film with a field of view that corresponds approxi8 kqembb+ofwht :o 0m8-al j;.voo34 nmately to that of normal vision is re+-3flomoahn ;t 0bo .kb8mj v4wo8:eqferred 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 .f a0l5p 1ug)2 v5rnz ,iadmu7gvjm./mv kv4gto 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 fielgzfv5c + zax*n373.+j ynu *ikx0mxcjd of view than that of the eye and through which objects appear smaller is referred to as33n+yj. 0 ixvcmzk *x5fujgncx7*az + 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 humanek e) gxdr.4a 2co:oz)b /5r12rcnxvm 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 oy rz+9p/)z vais2u , qffzcllzbq733 -f 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 svyxy;oh2w :yt2 mr-6at which an eye 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 a. ogkxw7xbhz,e a2cndc4 ) .9jt which an 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 back, the person is likely5h2i6pym,hlm6m(cz hvk 8y c m6)z .ud to suffer fi y66p.(hzcy 8c h6,mvdlmhukmz2m 5 )rom

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 be correcteef7os +rd1c3gd 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 2 k2ybs73v k pnun9pn,a vision defect that can be corrected by using9kk,2vbn s3 ny2u 7pnp

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 mqw0l 9+,ykhwfrom front to back, the person is likely to sufferwwl ,y0+9hqmk 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 usually be l,w3n 7ch ,-gz8tagnmcorrected 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 shy/gtzq3zt) b+ort from front to back, this gives rise to a vision defect tht+tyzz 3b)/qg at can be corrected 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 wytxy2q; m pm)5 f8eyv.t)ei: 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 using a very large diameter vrt g w7 y+ .7f*w8rbvfyfq xbo;1z*s)objective in an astronomical tv wb);*s+gfy*rzr .fy8qtfwb17 7o xvelescope 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 screen ic ,rv.9 idk;gxs placed in front of the lower half of the objective lens. What effect will this have?g dixk.,c;r 9v

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 viswu5 1s 5/wcdfq,k d70ma1emofible spectrum, in which of the fok05 ufoa s1q/cd 1em m7,wd5wfllowing cases would you be able to best distinguish between two closely spaced stars? (The lens 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 a magnificf/m(rbep r*r 2ation $m$. 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 cqg4zh me)t11ml5 0 eeexpect to be able to see the greatest detail when using a microscope?ct15le0m 4h me)1ezqg

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 i 2 b;mhq p04v:;a j5+ izwlcgwyud7c.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, ic omp2i:kr/ 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 refer ) gr(jimft;p)s 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 docg0 qgw z142nsubled, what happens to its resolving power assuming tc gw 42s1g0znqhat all other factors remain unchanged? 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 cm. What lens (in diopters) will*/9b qd )wqkta allow this person to see distant owb qa k9*d)q/tbjects 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. ygq04(yhgw8 , * 7zfmtb +zybo What power of lens should bbgh(0y7+f,gyzwy o m8t*4bqz e prescribed 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 r1m.*i i a40(nw gzrtnhave power of -0.15 D. What is the person's far poinn.imzinr14(w*0r a tgt 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 farsightedness where d ik+jw1ye wn9gm8q rsv:4.9lthe uncorrected near poiskg1yn4.dm+q9lvj8e r w iw9:nt 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 glasses 8p lb)o75skpohy/v ,gclose to her eyes, and with them she can comfortably read a newspaper at a distance of 25 cm./sp,) 8bklo7vp y5gho 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 v3ytd/*/k v sia newspaper held 25 cm from his eyes, if he wears glassed/vtsy3ik /* vs 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 focq-sas qzkq1ek0r/ 9h )al length of 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 focused at infiniskqs 19- 0q rhke/azq)ty?

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 per z1i6i1s87- wmixjwvqson has a near point of 25 cm. 7zw8sxi1 6imvij1 wq- What 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( vzf3h7cbm;)drjve 1 7.0 cm. What is the magnification if the image (jr; bfcd 3z)eh7v 1mvis viewed 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 magnifyzh 0 cy+;xmqi28oz,;jd6b(zd lvt) iying glass. What is the maximum possibl ,0b;yhmdzz o(zd+vj y2 lc6xqi8)ti ;e 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 magnifying glass.parv,vk3n,qn th* +) 77butak What is the magnification if the person's eye is h tvk3t,a)k u7n+q n avp,rb7*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-gr zl 8m,01jy6ifbqd.tip ;q, 8.0 cm, and 16.0 cm. If you were to use any two of these lenses to build a telescope, what is tjr -ldbi6fp.m 8qz,ty ;ig01 qhe 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,1mf eu3q a s/0n1gojs5 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 telesmosa13g5 su /jf1 0qencope?

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 itmx fv ln1rb7c-v/b73wy6 z/rfs eyepiece has a focal lez vb/rfbc 1ny-xvr6w mlf7 /73ngth 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 d6ua lfxu 3+zyr0z/-o7es kj/magnification of 10. If the telescope has a converlfer x/zy 06zd3oj+7/ukas - uging 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 10. If t2bjuh3 v;* 3,h hswuidhe telescope has a converging lens of f* h b3;uui2wdvshj,h 3ocal 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,4 xhyuuec,/o 10X telescope. If the telescope is limited to a length of 20 cm, what is t4y ,eouc,/xuhhe 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 mm and an eyepiece of g7+7 mdvkqghp6/:wcc focal length 20 mm, adjusted for minimum eyestrain. A blood sample is placed 1.chp wd: q7 m6g7c+/gkv5 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 focal le 7f6l(2)gfbijdj pun5 ngth 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimum eyd56bnpf)j u lgf (72jiestrain. 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 lengt5:aasz * gw4qwgulm ro)m+j:ke+d + q9h of 3.00 mm and an eyepiece o+ea5o4k g+ )u qd+ g zjar::wm*qwml9sf focal length 6.00 cm. If the two lenses 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 and an objectivefgv 5b r;v8260ahilee with a focal length of 8.0 mm. What is the focal length ov2evla0gir; e8bhf 65f 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 separationp) wq78 x3 kxmqfhh qzrzs4;49 of 10-5 rad. If the wavelength of the light from the system is 500 nm, what is the smallest aperture (diameter) qqxhhf p 84ks)rm q7 9x3z;w4ztelescope 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 obfg; lut,8 czocxq5 bj )d2u),l bb6:qijects which are 0.010 mm apart. If the focal length of the objective is 4.0 cm and the wavelength of light us oxf8 ul62lq bq,gut, z:;)id5bc)cbj ed 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. ur syrde; 8;c*,h/adj-k1. z3gl jebb5 mm to 1.5 mm as the illumination is increased. By what factor does the minimum angle of drdac-j *1bb3e yjkzu,8es;grhl/.; 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 Hubble1f c .b2moexdme6 1va5 Space Telescope has been placed into Earth orbit by the space shuttle. What angularmmfo e65x 1bv 2.daec1 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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