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

1#

The length of time the shutter is open and the film is exposedhcout6 no 5jugh58 *r8 in a camera is detergr865uhhc85 o*n jtoumined by 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 deterdk ccz 2 ddrw9y9nx85s/ (zs+rmined 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 lkpo3n e 62 fs*kkmq8 ya-;vf5lens-film distance may be varied by sliding the lens forward or backward with respect to the camera housing. If, with such a cam-p*k 5;vlyek n8sf k3 oqfm6a2era, 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 cokgy07z3khisixk/)w9 vers the film with a field of view that corresponds approximately to that of normal vigz/0k9swhk) kxy73i ision 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 actxolx7 km-d :w)h ez26qs like a telescope to 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 than tha p*n,t ijvi9+k;2+k eneho(hst of the eye and through which vhinnpeh+ ot2,*ks;k9i(j+e 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 diff2wtzt(i 1x a+y4( iij h2nj*k(po sd)gerent 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 the eye occ;qhw3s y l1,zjald60rurs 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 whice- d0gfy3 ;t:bj 8ozqsh an 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 at which an eye can see objecmb*wwjg+shu;20yqyn h go u+n xe8)0v0g38w u ts 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, tmt s )fzc5if ,0l rh9 r1.ex*dg2edf;lhe person is likely to sufferef1tmre5) dsr0l,h 9f c2l;d*gfi. zx 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 corrected wi /nl7l2hnrdi*3+ wazr th

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 t/8vh n; f)lnlxhe(bg ku) b+w2oo long from front to back, this gives rise to a vision defect that can be correctefb 2hl el)kw+)n8u/gvx;hbn ( d 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 isei089s prmw 2xs*nx a4 too short from front to back, the person is likely to suffern49sepi*w r s 02m8axx 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 coa1ii5 (avbg5 lrrected 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 gi 4idoa8rar 0/pwp;+3uwt p4 eei86aszves rise to a vision defeceo p60r w ii 3w8ea4p/ua8+rs 4d;ztapt 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 magn0oop v4byv9z8 ifying 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,/c9 kqu:jf uhter objective in an astronomical telescope qchkf/,u u9j: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 telescop tk n tr;gvm,g/qj3wtqt4//91t,vawikv 6lj6 e. Suppose an opaque screen is placed in front oqvi l t3,tkjt t ,6g/n/m69vq/41;tvwgjrkwaf 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 usect2nue a.lp9v5 v:kn *d has uniform sensitivity throughout 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 l5u.nvae9t pnl c:v* k2ens 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 magnifica7tn.ttk:d.rsml6 h *ostzw(y 7g(d1 a tion $m$. 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 8wu zxmfb qhw .eidps86);d)5expect to be able to see the greatest detail when using a microscob s8x hiz6qduepf ;5 .8md)w)wpe?

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 ,uvhy :1oa sa vf4:cb)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 suffe) l4(vcgusau(r 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 microscopet) 1 p7fyeqyy6 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 its resolvicmmd s1hv2cowk /.*h0 ng power assuming that all other factors remain unchanged? Its 01wdc2./mcvoh sh*km 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 point6w1nx on *-nzo 7x;civ of 18 cm. What lens (in diopters) will allowc6;onxinvz *-onx17 w this person 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 away. 3 *4zop6szmb mWhat power of lens should be prescribed if the glass is to be worn 1.00 cm in front of the *4s3mz bpmo6z 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 h26x od ;ozjd8q: sdapp7-ul /lenses have power of -0.15 D. What is ;/7h p ouq6 8z2djx:p osadl-dthe 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 toocnk:0a1ln,dg xb,(x6z g z.k correct for farsightedness where the uncorrected near point is 75 cm b1ankzggxck60.,l,xnd :(o z?

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 fargy .3aah 3l;ie5 m(agqsighted person is 100 cm. She places reading glasses close to her eyes, and with them she can comfortabghm3ga yi.a;3al5e(qly 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 x/xs q a(u7;nuwears glassu7x;unx(q s/a es 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 kmwgw 5au71f9a focal length of 10 cm. A person has a near point of 25 cm. What is the magnification of the lens for that person when tkuf9mw5 g7a1w heir 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 focalxf+iiu9yhjufs9.x 4a-6 y;ov 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 are focused at their near point.+yv4u6 io-f9xi yf j uh;xsa9?

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 focay4 te1 yqa/44.zshbiol length of 7.0 cm. What is the magnification if the image is viewed by b4/.s 41hzyy4etqi aoa 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 a magnifying glass. r( xrdsb:8,gf What is the maximum possirsdbfrg, x:8 (ble magnification?

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 len2hw/q(ux 8 d/2aau j/ 8/ pv epvjq5s-bzywxe1s of focal length 5.0 cm as a magnifying glass. What is the magnzs//2qdx1yb/ j/we 2x p e-8vaj8uhq(pvu wa5 ification 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.f ws+w/s*da4 k- onsz fg88cg)0 cm, 4.0 cm, 8.0 cm, and 16.0 cm. If you were to use any two of these lense ssf-)do g/8sacwzk fn w+g48*s 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 cm,)(;dy 4z. ifw(qqtkb x 4.0 cm, 8.0 cm, and 16 cm. If you were to us qzt( ) xi.f(4yqw;bdke 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 telesc7rue8l) c6eybh(ivh4dd+5.s x es c-mope has a focal length of 200 cm and its eyepiece has a fy6h du-.ls) 8di+eb (mv4 ecrcex7hs 5ocal 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 with a magnification of 1e7p qedfds. 4nj;,ocxk*.4rp 0. If the telescope has a converging lens of focal length 50 cm, what is the focal lej poksdcrqnpd*e,44e.f7x ;.ngth 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 telescopek/g)hc7c 7qg.io l5 c5 zi9hkf with a magnification of 10. If the telescop5gho7.5/7zc9 f qk)h ligcckie has a converging 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 (()qacqe)j5btcj6*xie +z wx telescope. If the telescope is limited to a length of 20 cm, what ist*bxc+)wi5 (q 6 (cex )jejzqa 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:p7 7dewkc c,vs(ow*z focal length 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimum eyestrain. A blood se wk:,c(7odc*wzsp 7 vample 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 le*9 pydqmi6 po*ngth 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimm9ypd*p6oiq * um 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 has an objective with a focal length of 3d:nmd z55;, d5kjp- by5c bgeb.00 mm and an eyepiece of focal length 6.00 cm. If the two lenses are separated by 40.0 cm, what is the total magnificat5d, kb: yne5-5mb djcdbgp;z5ion?

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 an,o b+ 2enc2xfj6.vgw8d2 l1brve ie1s d an objective with a focal length of 8.0 mm. What is the focal length of the eyepiece to give a total magnification of 240,lf. sn2re1b6d2j 8o ee2v1 b i+gcvxw?

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 angular separation o5y 5;j2* kt qf( bveem kzvh758pxkl)hf 10-5 rad. p2kbh mz7;e 5klh vxje)(yvk855* q ftIf the wavelength 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 microscopq121enr, . qk +-rhvndy (fzhxe is designed to resolve objects which are 0.010 mm apart. If the fzh.f+nny hrq1d- 2v1kxr ,e(qocal 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 dhvo7 .ciax b* 1a9mk/,(cnoup iameter of 3.5 mm to 1.5 mm as the illumination is increased. 1xm(7c* 9h/aok cbu ia. on,pvBy what 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 S4 i1fhl.:-gz; +if .miluiule pace Telescope has been placed into Earth orbit by the spacfh:1l uilfzm glii ;e..4+i-ue 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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