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

1#

The length of time the shutter is open and the film is )o*/ufwsd0.jf2: v ptcx jco 2exposed in a camera is determ uft x. cj*ow)c220vd:s fp/joined 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 camew8ef 7isp;yeg oc( .0tra 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 tlub:jbwl qa2/ ,ov/hq /0oa3hhe lens-film distance may be varied by sliding the lens forward or backward with respect to the camera housing. b,2/qql uahbo a3vlo0//:hwj 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 corr* m4.rvuyps6sh ),0 m-xudl pbesponds approximately to thahy.d)4 bsrmu,v6p*mux 0 s p-lt 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 telpab 2* 3d5ucuxescope 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 thim)rydbd*(ie 3bk7 ml,*3sdoe film with a wider field of view than that of the eye and through whk,( bl3 e*sdd rmi7d3i*mb)oyich 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 ways is a camera different fromt* x-zi 4d1r9ecuq*gk(rpmv5 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 xhhcy jes )5g.9l+nb)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 o0xgghzea/:e /m* wm +7ckf 8xwbjects 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 objevf63g vmccfq4 . 44bjocts 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 likely to lha(,g-5j q 0y(3fqjiri)g wtsuffer frol- yr5g(j i , 3gq0jqwif)th(am

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 correctg5gfex6ttdv5jo7r,79c : lizin ;b+bed 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 risg e4ns(f1wr z;ach+sto;l1a/e to a vision deag+ce; hw(f1/ta4sozrls n 1;fect that 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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14#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

If a person's eyeball is toonf prpai6.9 f8 v42z;ibb ua38eablu8 short from front to back, the person is likely to suf.6b ;np2i la8aaub4i8u9epvzr3ffb 8fer 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 b;-m2, gjz ulwne 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 bayrqo vg+37yc8 fs8t m1ck, this gives rise to a vision defect that8 rqv ty csoy+f3g178m 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 magnigng:7 ca+9epf fying 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 objective in an astronovjus4.ddi0 z+ mical telescope d04i.+ vujds zis

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 refractingm e3kdf)hs /*syr1w9n,s+ ylk telescope. Suppose an opaque screen is placed in front of the lower half of the objective lens. What effect ,w) 9 hs kymklne+3s*fs /1yrdwill 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/- fggtfpq2 9i,jy8ts sensitivity throughout the visible spectrum, in which of the following cases wouldp g2tf ys8t 9jf/q-,gi 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:el .vwjhla:iqb5 5pc*n7g) e 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 lighx 3xu xo9n4nd77u dr/qt would you expect to be able to see the greatest detail when using a microscox7xn dn oxdr/7u q4u93pe?

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 fia+ -c8b6aje wbcv1 2nrom

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 fromkxa2/u/3 n asl

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, /ue;wg:(o xshqzc b7(pjp8ksbb0l3 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 do+qj sxa,2na v1tnje2 k,q+a7uubled, what happens to its resolving power assuming that all other factors remain unc kj ,2sena,vut1q nx +a+q2a7jhanged? 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 poiv()ld;0:e9q6z-g x (ousih ugd:aojpnt of 18 cm. What lens (in diopters) will allow this person to see(l;p: 6 dgues-gi (9ohq: vzj o)dxua0 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 70.0 cm awa3*t wm9qa( qsa.hj 6 )sqsnhb 9f+n+key. What power of lens should be prescribed if the glass is to be worn 1.00 cm in frqa. e sta)(sh69jhw*s9+qqnm fbn+ k3ont 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 power of -0.15 D. What i(hex/l;pfr4 es the person's far point if the glasses are very che4l( e/x;f prlose 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 uh0 qyay8ei: xg9*8 mziu n;:dfncorrected near poin:9eg zq*xunf 8y:hy a imd;i08t 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 abqkgg glfk9*(2cq0d4s,o 8i2h ujj2 is 100 cm. She places reading glasses close to her eyes, and with them she can comfortably read a newspaper at a distance of 2 9jjg(cg2hq4 du,kgbis2 lf *k8aq 0o25 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 1d udzt8: p+xunewspaper held 25 cm from his eyes, if he wears glas8+d: xd1pt uuzses 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 xcy6abu 0 .i*(ool.bga focal 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*i.0 xa l.ucbo(6o gby 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. zik9q dolbz.0 0am c*6sjbo q,e8x+e,g40 i tb 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 94,beq x,zbs otde+ 0ilbcz 0mo*aj6g.iq 0k8their 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.x td.sh,2k3v* z/lujq0 cm. What is the magnification if the image is viewed by a relaxed, t2hvqjks 3*z. dlux/ 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 glas +jyi6yj+p13dnyz*-+ jfugk n s. What is1-fu+zi * ngdjjjp+ k6+ny3yy 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 536p55iges,edyj g8dm .0 cm as a magnifying glass. What3g iegdj,d5 6sep m8y5 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 f 7*yna buxm6-t3(zb abocal lengths 2.0 cm, 4.0 cm, 8.0 cm, and 16.0 cm. If you b(uxm -tn 6az37yabb*were to use any 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 focal lengths+0 .l vsbf8afy0rge10niyih-o , r vi2 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, what is the lens separation for thy10ie.ag rnh lriv-ifyof0 v+8,20 s be 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 teleaibfjb /t/a;. sw)3 iauvy /-rscope has a focal length of 200 cm and its eyepiece has a focal length of/iyu a - 3 ;t.vwfb/arsb)jai/
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 magnacd6o; k q sly ::vf48sdfpz:,ification of 10. If the telessp,caf:s6 vzd 4yqkf:; l8do:cope 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 magnifica/wj d7,t -s(wj dvsjw-tion of 10. If the telescope has a converging lens of focal length 50 cm, what is the resulting length vt(, s-jd-ws/7wdjwj 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 thewhk6 *of w;2g9egfsi02:8ryh tows6 y telescope is limited to a length of 20 cm, what is the approximate foca8y0esfk 6h gwo hw;9 :y2sof*6i wrtg2l 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 mk4ntbr2/a6i-cg .pxfwe2 c+ z m and an eyepiece of focal length 20 mm, adjusted for mbxiw6crt f-22+.n kg4za /cpeinimum 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 of 2gx-qrdx8 hv )b(:esufocal length 1.4 mm and an eyepiece of focal length 20 mm, adjusted for 2squxdv hgb:r8ex )-( 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 o *:0 u iaus3cvq2f(kw51prg kfbjective with a focal length of 3.00 mm and an eyepiece of focal length 6.00 cm. If the two lenses are separated by 40.0 cm, whap uk52 giqw su:vf fkc0*1r(a3t 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 *0 fdc+ ohoq-xhas a 18-cm barrel and an objective with a focal length of 8.0 mm. What is the focal length of the eyepiece to give a total magnification of 2h*qc+o d-oxf040?

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 cons uel/p(,yiz.69 3aw8amurntkdsv+.xtellation Orion has an angular separation of 10-5 rad. If the wave xel.r /v+iuama3 n.98w (tszu,yp6dklength 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 which are 0.010 ma 6/9a8m pdsj*nhk*w31tv jtm m apart. If the focal length of the objective is 4.0 cm and the wavelength of light used is 550 nm, wha8ktjs*6aw t/mj * pm9 1vdn3hat 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 as tt cg .t70 jchiov:-f9phe illumination is increased. By what factor does the minimum 70oifcvg: p h9tjtc-. 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 been placed into Earttx7*o/;u6; g gc*dvhpw sgki8h orbit by the space shuttle. What angular re;go*p g76chvuwsx* /tdgi; 8ksolution 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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