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

1#

The length of time the shutter is open and the film is exposed in a camera 8ts m5q:0u)h6jy,pnshy 6 utais determined b6yu8,u 0hs ahp mjs:q5ttn)6 yy 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 reac8a1 ez9flprpmyst: -,hing the 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-film distance may be varied by slid +r5fk9*qq kd*p6, dp uhno9qiing the lh,qfkd9pkri n q9dqpo*u+ * 65ens forward or backward with respect to the 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 fiel/a;ic1 4 t3yq 9 t/;f s9v0,aqqdygaxmrec,nad of view that corresponds approximatele1g ct3 qmdyaa;q0 /,y rs4 /viaqacf,99 ;xtny to that 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 tx dcf- p5.pv1ro 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 t4/kn pjrbpeul,2+nw q1h*5 wf hat of the eye and through which objectqrp2hw/ 1epjn wf ,n u5klb4+*s 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 d6 5*i:farde o(54bauza (se ,/aztuj oifferent 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 refraction2*idb5tcqb 67oc-xdy 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 objects clearp 7s)xg(m m)8ur6e6ngcy y- uely 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 yk (zp9dx/u)dxt9 u- +z/gnlosee 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 from front to back, the person is likely toj3en-bg:wdfltj j rs+3n72z2uv3n9p suff f97nzdu sn2+e 3g vp tjlwr-2b3j3jn:er 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 corr ly rj-hu,7px57i x7egected 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 rise tof+ ddjp7xho8 0v *,jkt a vision defed7fv +k x0jtdo*,j hp8ct 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 too short from front to back, the person kwu*y-wj( ut9s,wwg + is likely to suft ksw j y-gwuw*+w9u,(fer 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 usuaqjo(h7s b0 rusw )9ia8x9 c.kllly 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, this gives ris 2mg(92jcpfnl e to a vision d 2pfm(ncl2 9jgefect 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 magnif mrld,y4ak,vfi u:ye(b7vg0( ying 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 objectivej 3h .o5t kqs f35ulu1s zkbmorsg,+,) in an astronomical teleso +ks,u 5zmk ,o3b)sfqrsu53 t.jghl1 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 formed 3 fvcphgh0rccb9d 1a :+i p+h/by a refracting telescope. Suppose an opaque screen is placed in front of v+dcc+bp0ih/1 :crg9 ap hf3h 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 sensitivity throughos/f-5w:t q ne11pmwosut the visible spectrum, in which of the following cases would you be able to best d: q/ows1 fmesw-p1t5n istinguish 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 a magnifip tc by;g19xuggie03 hm (5r0( zmhra4cation $m$. 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 w/q-o.mdnd d u jqar+5t,tb* y,ould you expect to be able to see the greatest detail when using a micro* n 5rdtbdy mtq/,j+do.,a-uqscope?

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 suffegn;p;76sh i 03frc2w7tkmal swvk+1 fr 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 suf,sj4cej) x6okip 4 6kurmd )6ufer 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 tojgsn*hs ie): 3q69s)+ns6 fv npuj4lj

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 w 2 1a+oxq1hacis doubled, what happens to its resolving power assuming that all q2+ xaw1hca1oother 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. What lens (iz 5 /gh3nynqze4z ln84n diopters) will allow this person tnznqn/454yz ez38l h go 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 o3iyi /4 wk4u5y * j:vcvzf+hqxbjects more than 70.0 cm away. What power of lens sz 34*q j4 fiwcy5yuvk/vx+h:i hould be prescribed if the glass is to 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 p;;bm(beo zl 3have power of -0.15 D. What is th;zo( ml3bbp; ee person's far point if the glasses are very close 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 neede)jw .cm/t2.pog. o77t:-5mal0 pbl gmsobdwed to correct for farsightedness where the uncorrected near point is 75 -:0o .g wobl bes7tp .)a g2pwcj7dml5. mtm/ocm?

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 re a +i1xersjso-hhc98, ading glasses close to her eyes, and with them she can comfortai8+xs ecr-jo,hha19 s bly 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 w, 4bm gbuponuw8-8iy1nl+)z mears glasses owni) 1lun +b,oybp-mu 4z mg88f
+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 near point k q79h yse jg9b4uac2lwdp35xe96 jb(of 25 cm. What is the magnification of the lens for that person when their eyes are focused at infinlwjx4 (ha q5e 9p2 9egjucdky37b9sb6ity?

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 focfx33:-mk baba+3bqyef:gos 1y t u 1e1al 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 eyes 3bq-x+uyse3::1t3g abkfaef boy1 m1are 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. Whsr;qza2 . ,u5mjkb d2vat is the magnification if th j krvamsz2,q5u2;d. be image 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 ;-hdio2 yn ez4jv sleska+y.q0g7i42 a magnifying glass. What is the maximum possible magnificatioan + -qs sizv4yy40ogeh;.e 7kd2lj2in?

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 l+h/lp k.8)h+iazor u nens of focal length 5.0 cm as a magnifying glass. What is hu ph.zo rni++8ak l)/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 2.0 cm, 4.0 cm, 8.0 cm, and 1rh78j((kqg.rllobr 18 0kxov 6.0 cm. If you were to use any two of these lenses to build a telescoph(b8k7(q1 lgxo k8.r0vrjo l re, 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 lenlbxxol4,3zu+ 1 t 5jcsgths 2.0 cm, 4.0 cm, 8.0 cm, and 16 cm. If you were to use jl1bt5c x 4u ox+3zs,lany 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 a focal length of 200 cm and its eyepie. iffgbz1 +g n.l:qt5tce has a fnftzbgqi: ..+lg5tf1 ocal 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 telescope withe9p7y z ;vtm4: jes)qi a magnification of 10. If the te9ze)ysqi ve74;p j tm:lescope 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 1omdb:kwpi ,wq6/.egmagnification of 10. If the telescope has a converging lens of focal length 50 cm, what is the resulting length of eq6 i 1md: ok,.gp/wwbthe 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 the telescqc gl xt2jyip8 mk2b. c9ia+e68bi4g:ope is limited to a length of 20 cm, what is the approximate focal length of the objep+ aqbli.86:c482ymj2k9ce gtxigibctive?

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 ef 4 a26dj 8rgn6z: u3l0gkyre2x2ftvl yepiece of focal lengt 3eg rd8022uav2x ln:l6f g k4ryzf6tjh 20 mm, adjusted for minimum 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 focal length 1.4 mm fbi5 9o+m8 vq*97w5fzjc gpdjand an eyepiece of focal length 20 mm, adjusted for minimum eyestrain. A blood samcm+ i8jwz7j9g9b55dv*pfqf o ple 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 object2xpyxnb8; 61zz pw5kd ive 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 ;k6dwzpb 2 ynx18zpx5the 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 haj3 4sh z1./svsrha-w ps a 18-cm barrel and an objective with a focal length of 8.0 mm. What is the focal length of the eyepiec1ssav4zjp- wh sr3h/.e 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 angularo g3mmn -xc-1qqd07xl 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 - lq0x 7dnq-oc 1mg3xmresolve 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 du q4w x (o;5eqh(dq,hmo +el;-t4dwge esigned 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 diameteew4tg4o;x o(( hqw;,5le-+qdqhd meu r 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 d7db+gc7bjwkh1gcz,gc;6 0 j of 3.5 mm to 1.5 mm as the illumination is increased. By what factor does the minb7wd ,d cjhc1z+0 j6bc;7gg gkimum 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 bew,u6 ld 4yj3 y/a*yq+jk/lhzoen placed into Earth orbit by the space shuttle. What a lly/adhyoy+z*w/,u jjk4 q36ngular 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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