Physics Unit25: Optical Instruments

1#

The length of time the shutter is open and the qp2o-vt1i .b z5,s o eb30otukxlp)r7 film is exposed in a camera is determined )13 zobbluv7, otko.-e0xiqs2ptp 5 rby 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 detech bvy+:9qb-e9b- d jkrmined 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 hj ;m)auk88 gq;h- uaz1 h(tjajca +2mthe lens-film distance may be varied by sliding the lens forward or backward with respect to t;2m (k ju)zjaa8tu 8mg;acha1+jh- qhhe camera housing. 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 correspondldqyp d,) fq03z7s2 xis approximately to that xdd lq q7s3yi2z0,)fp 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 telescope to magnify images is referred to 9.m-2y yr/6zhowf :c.xv wn ywas 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 ,q6ntz-1):3jr jo e;w iuicog view than that of the eye and through rtz;e qg)u njw 36c,1:o iij-owhich 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 sr( eq ,g-hg5cdifferent 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 l2jyc15/q*m+qkeo l gthe 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 objects c cln2l zm3i8gq92hry 1 c0nm;d,zs)ro learly 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 see9+bnb2f4-i i6lcv7p s ew1hg s 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 not;6ny5 7gqk from front to back, the person is likely to suffe qk5n6n7t oyg;r 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 corxze3b 4w4mwl 0hwy0f8rected 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, h ac0e ped(ya()s,3gn this gives rise to a vision defect that can be corrected by usiyn3, 0)ahads p (e(egcng

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 pe4 0ts1wjdkg,fiv7jk s 7yywiyo9 -h9,rson is likely to su1sj y7 f4,wo9-hytj0i9 ksw gdi kyv,7ffer 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 correy0(3wx q47+iir nsbou4 ybr d;cted 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, thi2i:yd0jxkp;4 zb/v olese26 c s gives rise to a vision defect t: /c4 z 0le ej22ibpskydx6;ovhat 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 magnifying gll: qil -b35ks;5wq c(a fks3eyass?

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 diam.; v tcz4u8 txw22ztwveter objective in an astronomical telescope iszv w2 zct .vtwtx4u28;

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 op2lisla ,8 pwta1luv1x *rez:) aque screen is placed in front of the lower half of the objective lens. What effect will thit xv uwrl l,s*8)iazel 2pa:11s 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 hasuf)tn6h:b bk5or1tt 3 uniform sensitivity throughout the visible spectrum, in which of the following cases would you be able to best distinguish between63tot brnt )5kbfh: u1 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 a ma r hxce4q82/ybgnification $m$. 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 thgclr v 1,;c,wse greatest detail when usi ;l ,crs,cwv1gng 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 fmcdxwx*/m,goq2lxv33sgq,-k: q l n,yr9* hy rom

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+6a(o fnbxy:-c6dg c3xq, wjgffer 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 mi -es9 07,9r(ides iixxrh/s 1 aj6(mkddx(mt ycroscope 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 ha-cv7g ii5*hy mppens to its resolving power assuming that all other*-5cvg mi7ihy 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 point of 18 cm. Whde .;7bom;v9be3oaw92sj *k yecj,b hat lens (in diopters) will allow this person to seeb3ode ;9k ;o a*yjecbw7bv,.e9 h2smj 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 mt g*:klb8 ep;z tc)8w+xcfd5 more than 70.0 cm away. What power of lens should be prescribed if the glass is t+:8bg;)cwd5fxl tec8km * zpto 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 lenses have power of -0.15 Dv.b fa2oyhu 7zq- 7qn4. What is the person's far point if the glasses are very close a7 zhy2ov7f .bun-q4q 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 farsightednessm l*p6ez*m3m*t;m e t abd-bx/ where the uncorrected near ;btpe bm-m/x**dmm*t ez 36lapoint 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 is 100 cm. She places reading glasseeb-v,9y)os:zc v lf+p4-wqt*k1 bmw fs close t k bzvm1,s*ve )wcw-qb:ftfo ply4-9+o 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 newspaper held 25 cm from his eyes, ifreuq g9m,wf6*q/ jk8f he wears glass,8 /u *fmjrew 96gqkqfes 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 ; gaucdfb.:2v bue;8rear point of 25 cm. Whb cau8vr;:udgbe. 2;fat is the magnification of the 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 l2ja bqcpg) v 3j.2ufs2ength of 10 cm. A person has a near point of 25 cm. What is the magnification of the lens for th3ajb fc)ps2.quv 2 2gjat 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 tqoo *.c das39 bga6cc;he magnification if the image is viewed by a relc* oc;9c36og.sa dba qaxed 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 cmme-xzph wf, lk- o,-x r,j*x*o as a magnifying glass. What is the maximum possible magnificatimoe k f,-, x-rx* *,phzjoxwl-on?

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 magnifyifg*rr9f2 f ) (:ogjckyng glass. What is the magnification if the p f9 r(*orkfg2j)gy :cferson'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 2.0 cm, 4.0 cm, 8.0 cm, and 16.0 cm. tze 01z/uc .x-0kyj oi If you were to use any two of these lenses to build a telescope, what is the maximum magnification you 0k.xit0/ jceyuz 1-zocould 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 lel/ u1mzi1tlv/lf g b4-nses of focal lengths 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 the maximum magnification telescgb 1-/4zlv ltmf1uli /ope?

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 length of 200 cm and its eyepiece has a0wrl( 5hnldkppz(yq+w .(y .a focal lengtnlla pz+h0ypw(k.yw5d(r( q .h 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 magpo: qa) i : 3/.ngst+7oxeveesnification of 10. If the telescope has a converging lens of focal l e+3apt :sex7voi qe)/:.sognength 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 xm42xu3*o p5z)f,k4yrkcjly3i9 s bbmagnification of 10. If the telescope has a converging lens of focal length 50 cm,rul p3xs4f5xc b4)2y y*o9zkm3bk, ji what 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 telescope. If thelgx 9 ks3iwxx06-ml zzvl4r,2 telescope is limited to a length of 20 c2l9g , 0v-sik lzm4zrwxl 63xxm, 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 lens of focal m hdyff-9hx-5length 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 afm 9 yhhx--d5fre 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 lengt-ryyq j*- ofzjf -/xiks1(1qmh 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimumfj/sqq-- z yx-r1*j imkoy1 f( 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 hx mkt xphqb)pm/q; +8s;(( nbyas an objective with a focal length of 3.00 mm and an eyepiece of focal length 6.00 cm. If the two lenses are sepm s8x);xn q+k/qpt (m b(bh;pyarated 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 an objective ou8b7r/ :adimv 9 rj32* ysrqswith a focal length of 8.0 mm. What is the focal length of the ei ra7y/: mr*s2jo qd9vs3b u8ryepiece 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 anglnvr *j dac;8zii8h, l:yw5 n*ular separation of 10-5 rad. If the wavelength of the light from the system is 500 nm, what is the smallest aperture (diameter) telescope that can just resolve vll * cyw;:nz *,hani8jrdi58the 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 objz kl njrg*5w+jw)s .,0phdx7kects which are 0.010 mm apart. If the focal lensjx)kk5w07rwzpgjl ,hd.n +*gth 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 person's eye changes from a diameter of 3.5 mm to 1.5 mm am3 d jqrhi92wb2kc9 ; +h5 rx)pim-caes the illumination is increased. By what factork m5hwrr )bj9h-d mecic92qi +2;a3px 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 into Earth orb;1qvn :sd 1dwuit by the space shuttle.d1u1d;swv: q n What angular 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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