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

1#

The length of time the shutter is opm5an) :asbs)* d gd/cnen and the film is exposed in a camera is determined by th/5ca)smdg )dnna *s:be

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 deteb8 4yj 9sdftqyut8a 19rmined 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 rhp(. ofxf 9j4by sliding the lens forward or backward with respect to the camera housing.op r4h.fj9x(f 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 a/zvm2s y48 9v7eewshof view that corresponds approximately to that of normal vision es7w8/eyz4va9mv 2 hs 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 to2:e-dy.e ag ptetx8)j 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 .a :, dlxzl.vu wider field of view than that of the eye and t,.. zlv:uxdlahrough 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 fl5t 0u p0md he*v3a8mprom 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 the eye occurs yz4( z 0vnc4wbat 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 spexm+qol be1gj,)1 3 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 at which an eye cz*qc.mj 2)mtq l(l6-.z 8umtte e;xxuan 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, tuh,ywp r 0(k-bhe person is likely to suffer fromp k-w,rhy(0bu

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 correcjg86ft4 px-u;5o kliym 1 2zejted 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, tgu49et0sh f7*l-wt2xr+ti pdhis gives rise to a vision defect t-xp*+ tl4sed gwui t9702 rhfthat 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, tpgj2wpgwz.: s/ly o6 1he person is likely to suffer zwyg1go.6l/w pj :s2pfrom

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 corr* )mxuuz)x3;6ob 6uhk vyv y,yected 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 giv 58cr,mbowvq. es rise to a vision defect that can,mo5 b 8vwcqr. 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 *.;zs8zhi0bsb0z hxxglass?

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 yg:t bm5v ,v,fi+w o-hfor using a very large diameter objective in an astronomical telescope vmfg ,whbiv-+5 oyt:, 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 telesy u8qg1q.uwwwjn0l7:cope. Suppose an opaque screen is placed in front of the lower hal.ywqu10ww :ung 87qljf 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 uniz 9l7:6-, 1mjrspycqiu,yyg mform sensitivity throughout the visible spectrum, in which of the following cases would you be able to best distinguish between two closely:,7j1ip96uc-,z rs qyymmgly 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 magnifi2ta d /h 7ovc uvlorh9dd *;dcu88-ut4cation $m$. 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 b*yx+8jzs8c z3e v +sqjhce3 u/e able to see the greatest detail when usjs zv+que +*8z 3cycx3esh/ 8jing 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 from wvj-pw6n7h(*f ek ic;

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 suffercs(:zgc0erig.1 zwq* 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 m3y bgsi o:r-(yi2 fca.icroscope 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 itsut9;*ro9pvk kv kl5( c resolving power assuming that all other factors remain unchanged? Itsp;k* rlk 5tk9v9c(v ou 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 ofvr t0/wie m4s sr27zcfl6t-ikr9 )ft5 18 cm. What lens (in diopters) will allow this person5r tc z 4rlmk/7ws fe29f)i6st-virt0 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 cll,aax x 93nujh-:i a * mfensgbb+s5 38m3usu+early objects more than 70.0 cm away. What power of lens should be prescribuhai xnju ,a :++3eg9lunmb *5sas f33bsx m-8ed 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 len, 2d1*q1pto-z hjaiv tses have power of -0.15 D. What is the person's far point if j tz*pqi-vh1,a2t1 d othe 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 correct for farsigh *v2jityl73w : i7usbytedness where the uncorrected near point isil 7utjy2wy:73vb* s i 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 iy3wk 84 j-+i:uiieries 100 cm. She places reading glasses close to her eyes, and with them she can comfortably read a newspaper at a distance of 25 cm. Whatju4+w i ei3eik- 8ir:y 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 jd j)xvbj(1h 0j0gb2d he wears glasses gvdd jjjbhb(j02 1) 0xof
+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 poigx cogrk:e2,7nt of 25 cm. What is the magnification of the lens for that perr 2cg xgkeo:7,son 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 focalzrf k;zyx*3*f 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 **fz ;krxy3zfeyes 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. W8d. i;navsul8 t z8(gghat is the magnification if thegu(tsv8.g in8 d8; alz 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 convergi 67yny 4v/ghxvng lens of focal length 5.0 cm as a magnifying glass. What is the maximum possible magnificath76x/ y4 nyvvgion?

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 focalt3):j xj 1m*tfuc(l ml length 5.0 cm as a magnifying glass. What is the magnification if the person's eye is relaxelfm( *mttl: u)jj xc31d?

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 ley .(:ry:ul 6vmlm5 pkvnses of focal lengths 2.0 cm, 4.0 cm, 8.0 cm, and 16.0 cm. If you were to use any two of :v r.mkpv l6( lyuy:5mthese 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 4:j +fnknf v6 jc.su2dfocal lengths 2.0 cm, 4.0 cm, 8.0 cm, and 16 cm. If you were to un4jsfnfuc2k.:vj6+ d se 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 telescope has a focal length of 200 cm a(lmxsrj4:5doq a1l ic,nq, y4nd its eyepiece has a focal loqxl(,1mi sy5dqjc4a,: 4l rnength 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 magnification of 10. If a4a 9c ldxab.: /t*fhlthe telescope has a converging lens of focal lengthd l xlfa/ca bh:9t4.*a 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 6a xe 1+)pshmks+p6 thtelescope with a magnification of 10. If the telescope has a converging lens of focal lengthxt +hph+6es m pk1a6s) 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 limited to a length mr k9yd*99gw s(fsl1cof 20 c kcdyl g(9smf 9r1*sw9m, 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 length 1.4 mm and an eyepieceqturi3,3 qhxji9i ci6tcy,n 11mg -av5d h 4y1 of focal length 20 mm, adjusted for minimum eyestrain. A blood sample is placed 1.5 mm from the objective. How far apart are 3 ,19r1-udyi gth ,q jqm5c16ytcx4 av3iiinhthe 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 vt , e0c;sjvj-h1sa70em0somlength 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimum eyestrain. A blood sample is placed 1.5 h10 jvet; 7s,e0sj0mca-omvs 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 objective9. ekqvw1y j8cb wk+-3q)sdwp with a focal length of 3.00 mm and an eyepiece of focal length 6.00 cm. If the two leqpj- 38k.v 19 qyskw+)wedbcwnses 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 a focal lelghc gg6 q24cz a7)1vnngth of 8.0 mm. 1zg7g q glca4)n6c2 vhWhat 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 Orion has an anwe-(.ab qj u3egular separation of 10-5 rad. If the wavelength of the light from the system is 500 nm, what is the smalle-w a.eqejb 3(ust 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 re/c6(3+-z vzta:t r3 mumbfg gtsolve objects which are 0.010 mm apart. If the focal length of the objective is 4.0 cm and-z+v3ac(t mrf/bgtu 6zmt g3: 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 diadq qezi,:05v wmeter of 3.5 mm to 1.5 mm as the illumination is increased. By what factor does the minimum ied:qw5 ,0v zqangle 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 o0u4egb)vx ol5 rbit by the space shuttle. What angular resolution could this telescope achieve if the wavelength b) 4 l50vuegxois 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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