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

1#

The length of time the shu;bl m*cvq*46 ofjve-htter is open and the film is exposed in a camera is determib-qf 4c j;6vmv**hle oned 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 x2sl8xgzs:ji0sa o1. film in 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 the lens-film2qa l3u;o x/sc distance may be varied by sliding the lens forward or backward with respect to the camera housing. If, with such a c q3xa;uc ls2o/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+tri) )i0)jnppo q7p s the film with a field of view that corresponds approximately to that of) pi+p)prtq7j)0io sn 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 magnify images is referred a177u am/lyd u7tm/ bdto 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 field of view than that of the )nge j-a m3ck l)vlrmjer81;6eye and through ael nv1rm- rm6lk8je)j)3gc;which objects 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 g 715oufti ,mhways 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 refraction of light by the e /)n:arponjad9 4xo*u ye 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 cdemya+r-ftr0 z r9 :po2 b91e0e/lxqjlearly 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 zv;1yr-ss-dzbs d g4w1rzo 6 0eye 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 fzyvd7: -k2i ja 4fv+nkront to back, the person is likely to suffer k+ -2z7vd 4:iajfynk vfrom

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 usuabu) dr24/vd30kqj nuhlly 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 to g2z dnxhdn h;h3vuq,.t64y(eo long from front to back, this gives rise to a vision defect that can be corrected by usingn; z.nuq(devdgyh64h,t h2 x3

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 perso v :.uwlz-nz3,t6n gh8qx2wjv n is likely to suw htl-: wjz,.28vzn3 x6gv nquffer 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 corrected wivogqc2l6x)fl/a3 x 4tth

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 ba2*l: 0vcivx ;qb krs.g+k6cm yck, this gives rise to a vision defect that can be corrected m6rq:.c0vi x;c ybv k+ls*kg2by 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 magniz)9u ms+*mln/,ag(x xbd1kw bfying 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 objectiv37 /hzo 0rc+1qofxt hre in an astronomical telq3h /0xfr r7oto z1+chescope 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 opaq1tm mh ktj68p,ue screen is placed in front of the lower half of the objective lens. Wh,pm t8jh6mk1t at 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 sensiti +7 pvapvtt*f qs:f:ks s9,vx*vity 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 t*fk,7qa x:vvps9 :vs st ft*+po 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 magnificahr*-y gkp l8ll, ij s0qa7y*z1tion $m$. 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 (hew1:myw xq /h(6b-rw2h(nkbgd3s sm+ml9tto be able to see the greatest detail when using a microsd sly/e9th 2hw( 16xb-b(wwrg3 qk:+mm h( nmscope?

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 suffereecp3oogoh- 4x7r*ti8tq02 t 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 sufferyi4qsrdd0z v r2(x,/w 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 r; 4x5p0s/dexp gax0zaefers 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 itsupscl; gp++hf z m7ph+5 dgt73 resolving power assumh sd 3lc7p5gu;+7hf+tm +zp pging that 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 dwk-r-f2b x c2point of 18 cm. What lens (in diopters) will allow this person to see distant wdrfc 2xk2-b-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. syr- le9y:7pe What power of lens should be prescribed if the glass is to be seyl r9-ye p7: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 hav2x5gyr5o j,4,bw1 tkz ,ncg tve power of -0.15 D. What is the person's far point if the glasv nb55yr tjg og2,1c, ,t4kxwzses 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 farsightedne/2l ub-h/ 57b ycji;qeicags apm ,5z6ss where the uncorrected near point is 75 cm, z e-c/q55h;ail6m ypbg7/auij sbc 2?

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 glasshdjh,u w,p)dz5z0 0lses closeh0,zdjhp w)uzls05, d to her eyes, and with 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 newspapex-)cpu u5.jykjl8 - uju g5v)cr held 25 cm from his eyes, if he wears g)-jjv u yguju)kl85px.5 ucc- lasses 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 h:3y oghm-eiwtkq0; q b1bqr99as a near point of 25 cm. What is the magnification of the lens for thgby- k:q; 0imb3trw h9qqo19e at person when 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 1ck rv/yk nv,./0 cm. A person has a near point of 25 cm. What is the magnification of the lens for that person whvy//rkn , kv.cen 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. What is the magnification ifg1)(fzyhr9q w)mmov / the imw ( )z)goqfh19/ myvrmage is 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 convergf wqvhw0e: .b)ing lens of focal length 5.0 cm as a magnifying glass. What is the maximum possible magnificatiow hw0 .:eqv)fbn?

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 length6ts9f mqqyo):) 7r wb-j j*o:wkvxa iwj+)c*n 5.0 cm as a magnifying glass. What is the magnification if 7w9:o -n*mx 6jkq)vi scr ojt:*)aw bw+qy)fj 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 2.0dfx9krp71aqv m 1cv2( 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 the maxif(1pr1q2cxm 9v 7ka vdmum 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, and 16d q5kuni,yg) z6(g f5y cm. If you were to use any two of these lenses to build a telescope, what is the)6ny,d5(zy gi5q gfuk 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 tehc f4a1 36qczul ty;5n2k3e1hnw 7ih yc)w;qqlescope has a focal length of 200 cm and its eyepiece has a foci15kn 21qh3 cqf4;7yz hnh6;uywcqle at3 w)cal 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 astronomicw u;u3oqgcv 4zt )+y7cal telescope with a magnification of 10. If the telescope has a converging lens of focouy+twz )v47c3g;uqcal 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 telesc .hxl 2xnwe;oldp5w0 0ope with a magnification of 10. If the telescope has a converging lens of focal length 50 cm, what is the resulting length of the telescx2e5;.od0 lx0 lwnhp wope?

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 4fp u,+p a.di3qrow 9ilength ooi,4qp9fawud3.r p+i f 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 le(vaq5q;t2x rnns of focal 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 objectin; (v5qra q2xtve. 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 objectiv* /k*v ofv6 c6fqfnntr)3cj5ne lens of focal length 1.4 mm and an eyepiece of focal length 20 mm, a6rvnff/jnv 635q *ccto )fnk*djusted 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 objectiv-qc7*uc:d yvcao+ a x,e with a focal length of 3.00 mm and an eyepiece of focal length 6.00c+xcuva :d-*ay q, co7 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 ct/5b-of ep-y+l.6z jbomnkzr7/(mh an objective with a focal length of 8.0 morjzot - -+ 5 b(clemby6mh /.fn/kpz7m. What is the focal 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 ce,q7kvqr; ardi ;wz 9x c01w9uonstellation 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) k 1ev7wzqqdcr9 ,xri09; ;wua 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 objectr lgjh(( ak/a1s which are 0.010 mm apart. Ia1hj al (kgr(/f 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 perso0d*hdvm.kjfj8 vo pryp p,fc6 ar5/,0n's eye changes from a diameter of 3.5 mm to 1.5 mm as the illumination is increased. By wmdpdo68kv.,c 0ay jf j,f r0 vpr/5hp*hat 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 bee8 nv*jhfut8:r n placed into Earth orbit by the space shuttle. What angular resohunj *rft8: v8lution 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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