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

1#

The length of time the shutter is open ahgfz8d tt3+q :nd the film is exposed in a camera is determined b f:g83zqthtd+ y 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 inhi+k 7 xjz)) uzpae2 f+2y g)ijiu+1tk 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 t9ocn35d-1 kx8hg;rs f,ufyllhe lens-film distance may be varied by sliding the lens forward or backward with respect to the ccolxgkh y1-sf 5;ldr9un38 , famera 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 fiuw k* lr8(33-+ cxbwm j)uxuh*b.eke peld of view that corresponds approximae(u b w+rwujhx-m cke b.*x*383)ulpktely 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 -s +)hto:o5iajf v hd4x38anjto 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 film with a wider field of view tj7;9beeue hfo: a.i5 m:iqj-chan that of the eye and throcom:; i7a5e ejj ef:i.b-9 huqugh which 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 different from the hu(vl 7 z) - mcozdcsp*)0s5lgdxman 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 liqmtzzb66/fk cd zpp4pq4 (3e4f(i9 cqght 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 anea- cecbh+*4a sq6i c( eye can see objects 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 a6*,z:+n4puy+hgn 2.-e wvhy lixtwq bt 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 from front to back, the person is likely to s ff+0th)nj)3ydl0: whw u0nok ufw f+yn0)hh wk3jlod0 t):f u0nfer 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 correc2 )ds: f0glv1 e7obrwv-6 lx8el7ard lted 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 jc52 jmrf +a,+xcmt*+-gmto o to a vision defect that can be corrected omr-,mca+mj5jotgf+ 2+t c x*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 is likely tbe1u,t0 y0;x6i4 m p,qlzdyv to suffer f0;ymvtt60ezup,ly iq1 db4 ,x rom

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 usualqpxk+ /i8ffc9 ly 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, thmtlf4 ggel9 *c;ez3.x is gives rise to a vision defect that can bz fgg*c49; emtx3le l.e 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 iszoxk r p8 dm(cb2,8th/ a magnifying 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 diame,r iq 57ntpj*wter objective in an astronomical tetw75,r*npi jq lescope 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 refraxf5ju xqog 7d9+z/dhh186xg fcting telescope. Suppose an opaque screen is placed in front of the lower half of the objective lens. What eff8uxof9q x+gfj1 7d 5x6z hdgh/ect 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+xn7( hmumezp1ki 4 3l the visible spectrum, in which 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 tele i4( mz7hn lx+u13mkepscope 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 oqmqz)n2 1k.f 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 grea6le1rsxlk0v toi+( if7 5dnc,test detail when using a msd5(v roi ik 1xt7fl0l6,cn e+icroscope?

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 jls,u 7 *cs6i9e :ynfywbz50ffrom

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 fro x c1t7wy)ae.km

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 tokpf-wy(; fr*wlawy8 + 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 resolving poe7x/d5 viso logby6-;wer assuming that all other factors remain unchanged? Its resolving5 vxbdy/lso;g 6e oi7- 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 jw0 *t/ t ppbc1h-v-gv4k jq8ta far point of 18 cm. What lens (in diopters) will allow this persovqthp1/*4 j c-kvjt-tp80 wb gn 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 more than 70.0 cm asij944vqwk,ad n5*eg5* gu/m * qfhyrway. What power of lens should be prescribed if the 5smak/49 *qgw*y de5,4n u*hjfv qgriglass 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 e ,d9:pxb8 )wet jc3y 3rly.bdwhose lenses have power of -0.15 D. What is thetr )j :w9xbdep.dye3y 8blc, 3 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 needed to-2z zcd4 ibn*zg* t/fm correct for farsightedness where the uncorrected near point is 75gnz-ic2z 4m*df/ tbz* 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. Sh -jt7: tgt8vgke places reading glasses close to her eyes, and with them she can comfortably read a newspaper at a dig7tv:gt j-8kt stance 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 readh yq+kz.pm * -rpzdu.7 a newspaper held 25 cm from his eyes, if he wears glask+d.zyr7puph-m * .q zses 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 hz9me: u ,xgc8+o /obtias a near point of 25 cm. What is the magnification of the lens for that person when their eyes areozu +mb: o,89c txe/ig 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 fovm,jvjd 2 /qn2i+ bpaou1+ nz3cal length of 10 cm. A person has a near point of 25 cm. Whmn2djn 2zj 1+/3upv qaiob+v ,at is the magnification 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 focal length of 7.04obz +7srw.bg-z zo7u cm. What is the magnification if the image is viewed z7w.-og u 4rzb+7bozsby 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 converging9w1jl;- x0 2 qued xha0nibmz;g:2f zk lens of focal length 5.0 cm as a magnifying glass. What is the maximum possible man ma9l2bfujz zi g1h-20e k; dq;:xwx0gnification?

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 qz3 f+ b ih,vdj7h6xc;length 5.0 cm as a magnifying glass. What is the magnificationqcx;ihbfvhj 3z7d+, 6 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 mu-.mp.j 3vmses of focal lengths 2.0 cm, 4.0 cm, 8.0 cm, and 16.0 cm. If you were to use any two of.. smv-mu3pm j these lenses to build a telescope, 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 lengths 2.0 ct g 2-a g0me um7v6ciw-n6pdx;m, 4.0 cm, 8.0 cm, and 16 cm. If you were to use any two of these lenses to build a te e2c- wgm0 6mx6;upnig- avt7dlescope, 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 lenw*/e6essgia gxrr1/ ol6 p7+hgth of 200 cm and its eyepiece has ag/ps*l/67s+a 1 ewreri o6 xgh focal 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 as)igqq,k;.nqt*) f 2dma c-jb ntronomical telescope with a magnification of 10. If the telescope has a converging lens of focal length 50 cm, what is the focaqg tjf,nmcn*;q)q2idb)- . kal 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 astronomice 9au(kz 5f/6upp3ntr al telescope with a magnification of 10. If the telescope has a converging lens of/n rt(up 9uk5a6ef3pz 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+g h8 yf(pszk8 r;yj2r telescope. If the telescope is limited to a length of 20 cj;ks( +yg yz2fr 88rphm, 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 objectew0 d +/qt hwujgt- pf0.*jmv1ive lens of focal length 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimuv+0f0q u1dtj /hpwg.em-*t jw m 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 and an eyesx x 6d1ahf:1gpiece of focal length 20 mm, adjusted for minimum eyestrain. A blood sample i1dag1: sxxfh6 s 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 objecl.(bfqmq wkds/8m9 u 5zqx6m1 tive with a focal length of 3.00 mm and an eyepiece of focal length 6.00 cm. If thm18sd6uw .m/x qq (qzb 9lmk5fe 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 microscope has a 18-cm barrel and an objective with a2,m c-w8ijj+zkvg.zv focal length of 8.0 mm. What is the focak2vz i8jc-.jgzvw m, +l 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 Orion has an anashk 30vsmer: y0r7.igular 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 the two sti sh73ame0vs.r ry0:kars?

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 mm apart.hl9w hnooz1,:l z4rz+q8l qz3d 7hdw/ I dlq981 d,z:zzz/ wqw rh +n7lhh4olo3f the focal length 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 3.9z 9lxua .i m-e*j2nfj5 mm to 1.5 mm as the illumination is increased. By what factor does the minimum angle of resolution cfxinaju-2 *lz9 em.9 jhange?

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 Hubbb,x4nmhs suo7j c i+ *ult5f* *s7)pgjle Space Telescope has been placed into Earth orbit by the space shuttle. What angular resolution could this telescope achieve if the wavelength 7gihjts74* px )fn*bmu s ul,5ocjs+*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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