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

1#

The length of time the shutter is open and jtu2.i 9.d fa gk-c sla.j28zxthe film is exposed in a camera is detedt aj s 9g 2c8z-lx.f..juki2armined 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 th2xgoi jsyz/3;y48g f we 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-filhrvi(r 2 z+7oztxqv3 k:t:x3um distance may be varied by sliding the lens forward or backward with respect to the camera housing. If, with such a camera, a fuzzy picture is obtairx3 i(o:zvtu 7xvz2qt + h3r:kned, 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 wd/nxf:ga9j1 ho4 3ln ok :rc1lith a field of view that corresponds approximately to that ojlc:l :n /nr19 a3gofh xk4d1of 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 magn j8r.jyv9wc rwk9yi* /ify 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 field of view than that afmy: 4nfj xh*+cz g *pm3+:pdof the eye and through which objects appear smaller is :3:jp h zc4md+p*gy aff+x*nmreferred 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 differ; y,o ,)rifc4ycz7ouddi3l 8zent 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 occurs at 6j;ee(,aaj0m u sz4pu 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 obj0g4p,x+aocd ljp60(xbg6q3u twza8 aects 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 objects clearly-1+i;mn:c ,yh 0cv uhq-py9hxidd v a3 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 sz,dke4d8lz. /,6qtimh rcahwlq 31j6 ufqtciq al,z 4 h j,1ehw6drd/k.m6lz83fer 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 b;0tt 1ofoo2 ofe 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 frwz e6i(ar 9b6a,xx gi,om front to back, this gives rise to a vision defect that can be c,6i9z xrxe 6agaw(ib ,orrected 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 too short from front to back, the person is likely 4 .s: g3l bvd4zj (th,kuoedz8to suffertgz4 v3d( j.b8u :hkdols ,ze4 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 usu-vw2 k5iait :kally 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 back, ts p y3bns gc:;a g1*g,no3ynp:his gives rise to a vision defect thp ,g s1pg 3nso;nn: y3bg:cya*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 magnifyk5wtv 5ab01pw ing 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 objectivsxkw*ac: a fyu;3,ptc9t 2 -uce in an astronomical telescope ,puyc a;ckwc fa:t s-23*xt 9uis

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 scre;kbfvpt qr-7 fp (cq+614ril u:qa* yt):gg ceen is placed in front of the lower half of the oble+6: ;qb cp fvtc)r* (a:q4g7fkpr 1q-iutygjective 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 used has unifo yuv:4w f37jc7meozle.sd.6 frm sensitivity throughout the visible spectrum, in which of the following cases would you be able to best distinguish between two closo73eyffz w s. 6jec7vu.:dl4m ely 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 telescopnxfx0e4*mohnr/ b5 l) e has 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 light would yoven(1u;pn28 ujvyf4ovi i* v*u expect to be able to see the greatest detail whenfvno1*48(vviuuiy p je*nv2 ; using a microscope?

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 suffej(4dm ln gi9d s vdjdh)-k t;n4u 2ii5*ekr07er 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 su hbjq2ytno 2ly2wz; er33-c7nffer 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 8:/jv0o s.eotfh+ x b2qw3p b1tuv sc6refers 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 radasj))c-q, ap+g3szm dz r dish is doubled, what happens to its resolving power assuming that 3qzp -+mz gdsa)c)js ,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 hdnseobv2 ,1) eas a far point of 18 cm. What lens (in diopters) will allow this penvod 1eb,e)2s rson to 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 clearly objects more than 70.0 cm away.kz3m4a *dzb 7 tot3-tt What power of lens should be prescribed if the glass is to 4t 7ttam*3 k3-ztd zbobe 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 power of -0.15 D. What isg mr+m+z /fwi2/ll)kv the person's far point if the glasses are very close to thewf2gl kzr/lm/v) m ++i 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 fqffn gl; 7v wa)7lv.(kor farsightedness where the uncorrected near point is 75 kv) 7l.;a(7qfvg n lwfcm?

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 107j6 ijz ra3s.wg)ii 17i5m box0 cm. She places reading glasses close to her eyes, and with them she can comfortably read a newspaper a5 szig7mw1i3 o6a)j rbi j7i.xt 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 newspaper held 25 cm from his eyes, if 0njhxc 86jo;gs k ib45he wears gli jx;jbgh0 6n4s8k5coasses 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 ha8:zl izrusl +9zeb5brq) r, 4p/glf/ns a near point of 25 cm. What is the magnification of the lens for that person when their eyes are focuse/ 9lq,n+ )rlf:zze/8pr z lsb4 r5ubigd 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 .6bn;rw k.biq9n(lck focal length of 10 cm. A person has a near point of 25 cm. What is the magnification of the lens fwk 6.cbn .kl9(r;n bqior 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. What is the magnw5dxzf:h 4 n*eification if the im5w4hf zn:x ed*age 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 converging lens of focal length 5.0 cm as a magnids y4 t)s0c:xpfying glass. What is the maximum possible magnt 0)x: sd4yscpification?

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. a;rqvxact -0;k2 tp9)9 bod-vlsk x-jWhat is the magnification if the person's eye is re-t0pl-9kk- a bav cj xordx;vt;)s92q laxed?

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 lb 1vn(+c/izy zrdqabo8b*)so )h*h0 pengths 2.0 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 maximum map snr o+v1b 0/zdc)z i(b8hq*o*bhay)gnification 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 led(cxgw04vnmm 5l0sm +ngths 2.0 cm, 4.0 cm, 8.0 cm, and 16 cm. If you were to use any two of these le( v0mx ncs+m04wgmd 5lnses 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 telescope has a focal(1v5jdu)dyh u q8walsgy36 ; m length of 200 cm and its eyepiece has a symw dvgu 6)jduqh8(yl1a3;5focal 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 telescope1. m)nzcvdu* u with a magnification of 10. If the telescope has a converging lens of focal length 50 cm, what is the focu1m)uc v.z*dnal 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. +8+rou ujw c:g,y 1yteq:s k*tl9w0zaIf the telescope has a converging lens of focal length 50 cm, what is the resulting length ofge rwk uysu 9:yza* +j, l81:q0+ttocw 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 6dw efq4g 43rothe telescope is limited to a length of 20 cm, what is the approximate focal e63f4qod w4gr 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 le7i(3: *t4tty /8acynzmmnn b lns 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 objective. How far apart are the*:3itbtyl/4zn7(8 atnm cynm 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 length 1.4 mm and an en.mje7d5fc 8r n.xmva*:1vq wyepiece of focal length 20 mm, adjusted for minimum eyjm n vrwdaf1x5:n8e. 7 *.qvcmestrain. 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 ob; .357 uep3oylyoinaccc 7e2ljective 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, what is the total magnifi.u7c eay5nooc3cp2y ;il el37cation?

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 objective with a focal l7auio 11skkeby 3y56vength of 8.0 mm. What is thus o1ybv6 ky3ai51ke7 e 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 constellation Orion has an angular separation of 1s7dl1cg)hxn 3/c :owy p m;j8l0-5 rad. If the wavelength of the light from the system is 500 nm, what is the smallest aperture (diameter) telescope that can just re;lj cl78np/wdo:gs hmcy1 3 x)solve 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 desxwv n8bk::qbag q+g(3igned to resolve objects which are 0.010 mm apart. If the focal length of the objective is 4.0 cm and the wavelength of light used is vx(:qk wqg n+bg38:a b550 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 changuz y .9yn lltb1f/yjuj5keu2a)64v h9es from a diameter of 3.5 mm to 1.5 mm as the illumination is j.964a uf9/zjhvyl 1n u2t5bl)yykueincreased. 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 has been placed intorbtv +s j/18 7vyu8awk Earth orbit by the space shuttle. What angular resolutions+y8vkv/a18w jb 7ur t 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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