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 9c.kgj )x:fjxhk8 8 2hq dz.tzis determined jd9c.ft2jx):z.8 kz q g 8khhxby 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 . nr4fs gr8e/vfilm 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 maka:vr3pw)hnh v )t+;n 5mxbv3y be varied by sliding the lens forward or backward with respect to the camera housing. If, with such a camera+mrnn)kvpb a) v:th33 ; 5vhwx, 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 corresponds apigfi 3r9.lyk0n/wt2etq(1n7 dqg 1 faproximately to that of noaf tfilk(g tg7n.n1d3yr 9/2i ew1q 0qrmal 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 ast3qnmd x,9pe + 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 ox*rmai bi: g,4f view than that of the eye and through which r xbga i4i,m:*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 camerapiqdzc,bzl*a a 2n76 . 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 li8l-ivgjm uj by w0(-p;8,x5q ux6h svight 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 clo. xj+7tzbtycfh9ke7 2 () dxlearly 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 which8we-f k baa4ej:vdy 61 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 v-u8ji na h*ex)mox.(;wvqm0long from front to back, the person is likely to suw-x)8eimh( am.*xvuo 0q;v njffer 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 us:c owxc/.xl:fually be 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 from front to back, thispvw oc+n*,2, w w vkw*je0f9te gives rise to a vision defect that can be correctj 2wcevt*evof 9k+w0 * ,ww,nped 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;3h5 5p cbfepwfd+i*n from front to back, the person is likely to suffer p h*pif35dbfn;c+ 5e wfrom

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 correc6z wh0b*s ncx/ted 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*:7nts9wu7w c0 kmhgfkw,t 0u*.d ggw to back, this gives rise to a vision defect that can k k,:9 cwm u07ntgtgg whwdfu*7.0ws*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 gl-xl0xgqph8y23)rm zti5y9 ; z9j sxv cmn*q /vass?

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 anubd)p;n+g9nt ;.b*ma lla;r k astronomical teleb;. k*b9gpln;r+m duat;l)nascope 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 by a refracting ttp g.5;tpgn-oy+ d;ss, yo t8z1)akcgelescope. Suppose an opaque screen is placed in front of the lower half of the objective lenydgtyo. k,)gng ;t;5ppso1sc-+at z 8s. 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 throug-e+a;aek1i8f hua0 ks hout the visible spectrum, in which of the following cases would you be able to best distinguish between two akea -1+f0ikesu8h a;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 magnifies r7(cr.nt f0pke504-qgn ,kbnau;jcation $m$. 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 gre* r)llm z1mi,uatest detail when using au 1l*m m,rzi)l 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 qq6od;nydb ue+wxsw0(yu *n 83ebw2 ;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 suffer fv9ir er *jnp-;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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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 a g:tyuc cwf /*xqakx4 1h*u4c*bility 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 dm-dz a.;ab2pt85x tgg9 b.ymd ish is doubled, what happens to its resolving power assuming that all other factors remain unchanged? Its resolving poabt .-m 2ab;pg gm.5dt9z 8dxywer

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 (in diopters) will al3.v j(eh mza5ecyel15:+a v fflow this person to see distant objev3l (5m cehffyz 1ajv.ae5+: ects 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. What power of lens m, lz fs+2ja/ l/tbp1eae*jia/0zrn2should be prescribed if the glass is to be worn 1.00 cm in front o 2bt*ez/e asmn,az2/lf0jpir 1/+l jaf 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. 7: hm+drka(tkwd,do4 What is the person's far point if the glasses are ver4(d7+wktmdh,:od kary 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 needed to correct for farsightedness where the uncorrected /ca 3a wuo./j-5 ytigynear5igya a/c-/3j .wyuto point 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 1zcy0h,.6p2vzrhm hg x4h/gu xl2rp .glasses close to her eyes, and with them she can comfortably read a4z6 m pyvr pxgc.1r2 gxh/.2,uh0hzlh 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 5mgmb;h 2eny*zwzu6 ; cm from his eyes, if he wears glassegmez ;my5*zb; 6wn hu2s 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 lengq ny+ 304gdbafth of 10 cm. A person has a near point of 25 cd30n4+y agqbf m. What 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 length of 10 cm. A person has a near pk c6k2d 6i l2xa/bqck,oint of 25 cm. What is the magnification of the lens for thq/,6d2kc 2bka6i lxck at 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 magn+qi-a+ *ieth;(j/ g orm/yb -avpkcf-ification if the image is viewed by vi -- i a-qgc h*y;(mep+jfrab/+to/k 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 zim pym. sge;2-:8zio of focal length 5.0 cm as a magnifying glass. What is the maximum possible magnificatioe2mg .;zmy ois:z8-pin?

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 +kjaxi 9p;hwfe+4h*y focal length 5.0 cm as a magnifying glass. What is the mag+fikw j;4ph*h yx9a+enification 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 lens b nw/jxl+03 cedw5de-es of focal lengths 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 magnification you could achieve?e w e3l+n5/cw xdjd0b-

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 cm. l )x0)a dji1 7nxcyoeh:c1 xj6u,0ounIfo01ua 01h, )nyedx )jl:cxoux67 cjn i you 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 telesco7ea s8f mjl o(myrm/72if.o;rpe has a focal length of 200 cm and its eyepiece has a focal l2jori;fl8.ro(sfm y/ e 7ma7 mength 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 astronomicy+j 6p.n y7t;mtg/k7y) c,5t drei yqaal telescope with a magnification of 10. If the telescope has a converging lens of focal leng7;tm5t +a jg.d,c p6qyrk ty/n7iyy) eth 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 magnification -yg3mjjwmw 0 yvq um.-8sv *.uof 10. If the telescope has a cos3mvvq ujmu. j-*gw.8y 0wmy-nverging lens of focal length 50 cm, 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 the telescope is w20.cqca f d.gnm2 vs4limited to a length of 20 cm, what is the approximate focal length of the objecmfdc 2wg.s n0.q ac4v2tive?

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 1v kmic( b9zk1a8+* p :7gpq-/*jmzbjk sldh5 r.4 mm and an eyepiece of focal length 20 mm, adjusted for minimum eyestrain. A blood sample is placed 1.5 mm from the r :5d (p-b89 glhk *+z/pj17bkksj mzamviq* cobjective. 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 objecth4p 4vzqx-q+wz6qsb0h v 9nk:, 2zpfyive 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-sznvq2q6xfh0kp4wb9 z + p,zvq:4h y 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 objective with a focal length of mf6p.0h bv*zo 3.00 mm and an eyepiece of focal length 6.00 cm. If t vhp*.zob0 m6fhe two lenses are separated 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 microscopea/crg k et (3rg.)+qkl has a 18-cm barrel and an objective with a focal length of 8.0 mm. What is the focal length of the eyepiekr /.3lag) eq+g(ktcrce 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 angumpm5(- jsm s4 5gty8f22a,r busvai 2klar separation of 10-5 rad. If the wavelbt4(pjg amkv 2,smm fya8s-25 su 52riength of 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 is designed to resolve objects which are 0.010 m qetkpx5d3 4dt3r+ p.wm apart. If the focal length of the objective is 4.0 cm and the wavelength of light used is 550 nm.5x34+t d p e3dktqwrp, 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/brb8r-nox57wl - f -y6yl mjh diameter of 3.5 mm to 1.5 mm as the illumination is increased. By whl/x 7bl fwrhbo6y5-j r my8-n-at 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 placea 6he )gto2v6yd into Earth orbit by the e2y)ho tvg6a6 space shuttle. 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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