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

1#

The length of time the shutter is open and the film jfz6rd8 b9gtwr ah9;8ifdt, js 4 jf5)is exposed in a camera is determined by thez,j5 fi8r)w 9j4fa;th b8fsd6 tjdrg9

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 determig.e glwxhli,q:uuqg ,i/f 059 ned 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 lenp9f4ntxso i+sq*:mn /s-film distance may be varied by sliding the lens forward or backward with respect to the camera housing. If, with sucho*msxqfpitsn 49 n:/+ 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 oloe3a bd o:h-+f view that corresponds approximately to that of normal vebah3-lo :od+ision 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 vdkpez/ic80ql; 0b td+*f*f omagnify 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 thanpj9 :ofp-et ;spz .mny .+etg+ that of the eye and through which objects appear smaller is referred t+g+z9 ;epsjmno -.t:tef p.ypo 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 isu4)fygke./n0c2k k cx 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 k)czzbg6h7nee r2z7e+, jb9 +q en*umeye 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 clearly iswco 2l.s3dnkhh5 . y xv37j:hw

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 t )idu rfk*+.aobjects 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 bau zm-l4 ,7qps ozgpk/+ck, the person is likely to su+ /4 uzom-z7p,g sqlpkffer 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 be corrected won xsjq 04ez9+ith

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, thi(zghe 1mue-3 vs gives rise to a vision defect ez(3e ug1 mh-vthat 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 eyeballojewmr xw7/ y*o+ s8v7 is too short from front to back, the person is likely to suf87so*ovx+ry 7wj w/emfer 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 cob(,2 mqi6q-f2 bymkwwrrected 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 frf01r7scot*s aom front to back, this gives rise to a vision def1s0o7 t rs*cafect 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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17#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What type of lens is a magnify0k- 4 4qbmn i1qf bu,locx7j-qing 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 astronor 5-stqc,hk9sli0 :af mical telesf:sq- clsi9,thk0r a5 cope 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 formj 1f7ez,hi;ez ed by a refracting telescope. Suppose an opaque screen is placed in fronfj h7z 1e,e;zit 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 used has uniform sensitioya5t3z j)k p4vity throughout the visible spectrum, in which54)3j yoazktp of the following 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 y5 s-vg0g)v u9yezq0va 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 a.9jnrt/icx0 greatest detail when using a microsco9 tj0xia.r nc/pe?

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 /p)db1+fpb:y0ymr9j 6lk.0 eyb r 7x0 qb kjeqfrom

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 sufftc:j fi/:let c5 hv7i/8jcsm:er 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 refers to the ability tocrb : tbzorn+2 uhc6.y j.i;(h

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, whax61389es;/gp j(ldc tm qvdilt happens to its resolving power assuming that all other factors remain unchanged? d 9lxpitg(qv3m81j/s6; lce d 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 j fbmw2 0+1qucpoint of 18 cm. What lens (in diopters) will allow this person to s +m1c fjuw0q2bee 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 7g .;f2m wc.x 4uvnwhl-0.0 cm away. What power of lens should be prescribed if the glass is to be worn 1.00 cm in front o v4 hwug; flxm-c.w2n.f 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 lzn2s imos5trp/z- o 74enses have power of -0.15 D. What is the person's far point if the glasses are very close to t r n/-2s4tzm io7pszo5he 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 corrt ,w r8csr.(bdect for farsightedness where the uncorrected near point ictw(s,r d r.8bs 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 z+,;nw ukos5pza 29.zb x f*otperson is 100 cm. She places reading glasses close to her eyes, and with them she can comfortably read a newspaper at a distance of 25 cm. What lens pf.,5 z;pztkzx+b* woso a un29ower 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 h ltkn6*:awl- can read a newspaper held 25 cm from his eyes, if he wears glasses lh:tk w-*6anl 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 hasi) xb.u,0 8h nt(qjcrp a focal length of 10 cm. A person has a near point of 25 cm. What is the magnification of t,rtqb u.np (i08xch)j he lens for that 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 10 cm. A person has a near p6i .i7)gefj ftsw0g ,toint of 25 cm. What is the magnificatt)ggi70 f,t esj6if w.ion 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 9hfi4 w1g kc-r;2j e4w-ay xwafocal length of 7.0 cm. What is the magnification if the ima xic1kfga2h44ej ra9y;-w- ww ge 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 5jn;9qrgqf:0 hkkio(u6v ;pgpf w v3 (as a magnifying glass. What is the maximum po:0(u9qf v(6;ofvr wpiqjg n3;kg5 phkssible 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 focalqfzhg:s k 4b8q:5wg 7i2vjd.p length 5.0 cm as a magnifying glass. What is the magnification if the person's eye is r:vg d2p5i4h7bj kf qgz.: 8qwselaxed?

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, andj f:uuo 23yhp, 16.0 cm. If you were to use any two of these lenses to build a telescope, what is the maximum mu:o u,pjf32 yhagnification 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,i68l8j 4xv tzme0cat)m o62k h(z:u lm 4.0 cm, 8.0 cm, and 16 cm. If yoc8za i(6t mlm :t)hzel4j0 mx862vukou were to use any two of these lenses 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 d.lu4aa.s hq0u6l +ewl:0w vka focal length of 200 cm and its eyepiece has a focal len s. 04hqluv6+aa:wd0.lu elkwgth 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 magnificatioq7anlgq(/) hj33 ek t4 9;e5ew oj, plexu-yson of 10. If the telescope has a converging lens of focal length 50 cm, what isxo k s (3e9pqy g,lujwq)3oa4l;/ e7-htn5 eje 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 tmx4ai7(n yw35 v ,iv/c8xwmy5f/io dxelescope with a magnification of 10. If the telescope has a converging lens of focal length 50 cm, what54av 5nwvy,/im /f 8ixdci7xwo3m(xy 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 telescop19cl7 j gej8 u6if7euse. If the telescope is limited to a length of 20 cm, wh767ejlj8e f1gus 9 iucat 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 object2lsh bn0 6rf9 gd6fw5 c-v7nitive lens 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 objecc-56tgnr7l09n iffdbh2vws6 tive. 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 jk kxir,63vcb+aw/ h+ lens 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. What is the overall magnification?+ +w/xv6a h ,3bijrkck

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 ha myqgzy82e5oo/xjd j3czl(: 9s an objective 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 835me q/xyogcdl: 2jjy(zo9ztotal 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 6+w(u/7z5: uvp o m /-bdwqp bofpcn5qbarrel and an objective with a focal length of 8.0 mm. What is the focal length of the eyepiece tomc nz6u5(bo w w:7f/5upq-ov/q+ bdpp 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 t2q 3.x rcx/h:x mu*tutltx6a7he constellation Orion has an angular separation of 10-5 rad. If the wavelength o6tr ula/:.xt m2t7 c*uxhxq3 xf 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 (0en kiutk3x,. j jqtjm9,j .bis designed 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 550 nm, what is the diatqj(jte.3 ukxn jk ,9bj,m.0i meter 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 cho:7 . e.tw5tqtfqm4mvanges from a diameter of 3.5 mm to 1.5 mm as the illumination is increased. By what factoro e .45qtt7vfmmtw.q: 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 Telessn3/t9r/ o/ (w yhhse vxiu8,ucope has been placed into Earth orbit by the space shuttle. What angosh/ /,etx vsrw uy9u(8n3/ih ular 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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