Physics Unit25: Optical Instruments - 无忧得胜-网上国际课程 (5edu.win)

1#

The length of time the shutter is open and the film is exposed in a cai6:f) h86g we:bht) y4owry4dzlh 6svmera is dev6ybizhst:)4 w6h:r el)4 yf8h6 dowgtermined 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 determinedlk2u.hor 5)iiw u3 )vsqq g8m+ 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 may be varied by sli )lgh+j me 9ia6h6lws3.bdh6 ga gi4 osws..q)ding the lens forward or backward with respect to the camera housing. If, with such a camera, a fhm 4.6wssgj6bdah g ewgiasl+) ..)q oh 639liuzzy 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 thej/ 6y8m dn/urk film with a field of view that corresponds approximately to that of normal vision is referred /y8rnk ud6j/mto 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 telescwgio 59w a +dcu.i3p)h1a qaz/ope 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 the f4nbe6s (8 owrailm with a wider field of view than that of the eye and through which objects appear smaller iswbr 8 o4(6ensa 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 follmo*yc: kae3boq;h g*stt86b x65j m(yowing ways 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 refract+ufxr t9 2q0rgion of 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 objectsb383 hcc,r eb hwieoi;rf)( .f 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 a7 qj88zdlj5a0 87)hbeawedzl g3ko ad 0 18xfht 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 o) -r.rwq te,7 /9j3i5 xwpfn.okjhm bfrom front to back, the person is likely to suffer rwox ,t7ji)h kq3 .omje/.-p 59 wbfrnfrom

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 mu(h iur09 u6 wjb0i7bhb0 fi4corrected 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 cov3r) 9uk (tefront to back, this gives rise to a vision defect that can be corrected k9o3 ecutv()rby 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 f;grq+y5xt zn 1rom front to back, the person is likely to suffer frq1y z+g5xt; rnom

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 witc 6a7j aj* jxebsigp ohy:-9.)h

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*l4j-xo8k)g kfe9c s8d5 srko front to back, this gives rise to a vision defect that can be corr9do85oklrgjksx-f 84 es c) k*ected 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 glasksny5s -88 *xnyg a/8frt4aw)h zxu a/s?

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 astronomic2y +a yg )s8jdqn;tj)mal telescope g8s2+m;)n ytjy) qdjais

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 atz xzpizo9469 refracting telescope. Suppose an opaque screen is placed in front of the lower half of the 9z94xoi z6zt pobjective 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 sensitivity throughout the visible spectrum, 9g1z iwqslv;i r09tj1in which of the followi;9 i11tj0sl 9zwqr gving 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 telescoped(k 9c h u9v1uebg,.pf 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 you expect to be able to see the greateo4ews d.uk4)oxxz 2z1st detail when usinw.4 zo ek)o4sxxz1d 2ug 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 suffer fromj,7ki ybh0 qbw;9bj5i

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 fromlokj ; kn19*ff

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 micro9 ynlp.-p0dq ts 4itd8scope refers 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 its ps4:80ganp t /t4 q)beabf z/jresolving power assuming that all otha8apbtqf/04t z 4)jesn:p b /ger 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 pou. k*(ynnhce 5zi9 6spint of 18 cm. What lens (in diopters) will allow this person *i9nk5p s (hze6u.ycn 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 mor u:*5pkr j)qr9fe6hlxe than 70.0 cm away. What power of lens should be prescribed if the glass is 9qxh)6rjp:r *fu kl5eto 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 l (gsif4g3/k(v4nyjoa enses have power of -0.15 D. What is the person's far point if the glasses are very close to the e/ynos3g(4ajkg4i( fv yes?

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 uncorrect ;ks6p )iwy.ubed near point i.w6 ki;psyu )bs 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 rx4 zbyd1sk+npc)j7a :eading glasses close to her eyes, and with them she np1 sx a+7jzc:)bdk4ycan 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 newspaper held 25 cm from his eyes, if he wears rxn11 *;l snsmmrt) ,sglassenxs;slmnt)r,*1ms r 1s 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 has a n gm )cauke:t9)ear point of 25 cm. What is the magnification of the lens for tcg:tek9 a)u)m hat 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. Aao9.ek t wuunlqo u-:z)l, 6k f)gu4s+ person has a near point of 25 cm. What is the magnification6 4qaloe 9-lkkng, +z) .:wsfuoutuu) 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 a7nnu-f/j3 fm4vq vqf1 focal length of 7.0 cm. What is the magnification if the image is viewed by a relaxed eye?q-mvf7nn f3f4uj/v1 q

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 magnify.w- wdih i 148xgfij./3yc ukging glass. What is the maximum possible magnification?.ik3f/cj w -x1iiy8 ggd4wh.u

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 glasmivy8 dr-i9*; x jv7hvs. Wh j9i;h*r mi-vvydx87vat 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 focal lengths 2.lb:4((njap f w0 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 b(wa pj 4nl:f(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 2.0 cm, 4.0 cm, 8.0 cm, and 16 (ak /z)+)q:sxm4qiztaoi j+p cm. If you were to use any two of these lenses to build a telescope, what is the lens separation for the maximum magp(zsz/:o+tx iki +) m)q4 jaaqnification 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 lens u tdg/4 xla;su0uq-*gth of 200 cm and its eyepiece has a focal length oflus;-s/t axg4q du u*0
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 astronm:27;rhh 8mcszvrek l/) s1, m0ceh evomical telescope with a magnification of 10. If the telescope has ar2ml,sh7 m1rh/mvchkecz; )ees 0 8 :v 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 as o7ydwuvmy8uyyz- */2tronomical telescope with a magnification of 10. If the telescope has a converging lens of focal length 50 cm, what is the resulting length of the telescope?u8mu/yzo ydw*y v-72 y

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 limitey1kn)9sc2 9cqu9 ki xhd to a length of 20 cm, what is thx s2ycikqn99k ch1) u9e 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 gz5y -pivw : cd2b*9aheyepiece of focal length 20 mm, adjusted for minimum eyestrain. A bl y2*wid 5hv:z -bgcpa9ood 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 focal length 1.y/x8+ rq:hdtbcobv334 mm and an eyepiece of focal length 20 m th3/3bc q+b: d8yvoxrm, adjusted 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 objs,5bu e8b:itsective 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,sbt5sib u e:8.0 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 objective v5+x.tj))rq3kk x/kl i y7rb pwith a focal length of 8.0 mm. W 3/vbk jl)+tik rp y)q.57kxrxhat 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 constellation Ori 7r3/3yhtu9l;6v;w1x-uine e nxvql mon has an angular separation of 10-5 rad. If the wavelength of the light from the system is 500 nm, wvl33 ynnxer/ihtuwx;m9 - l7u61v e; qhat 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 res1hxpad 4pc vfed./0a9 olve objects which are 0.010 mm apart. If the focal length of thadex a49vchdp.0pf /1e 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 person's eye changes from a diamet 6t sskv4plb9hd7-,g*qnh9 cter of 3.5 mm to 1.5 mm as the illumination is increased. By what factor does the minimum a,q7tktlhsshb- 69 gdc4np *v9ngle 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 Earth orbitl: 1tn6el8gxy2tv.ry by the space shuttle. What angular resolution could this telescopt lx1tg yly6en8 vr.2:e 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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