Physics Unit27: Early Quantum Theory and Models of the Atom

1#

In a pair of accelerating platepy fwmg j. k0yr/-j,b+s, such as found inside a CRT, the electrons are emitted0.rgf-jy,jybk/m p w+

A. from the cathode which is positive, toward the anode which is positive.

B. from the cathode which is negative, toward the anode which is positive.

C. from the anode which is positive, toward the cathode which is negative.

D. from the anode which is negative, toward the cathode which is positive.

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A blackbody is an ideal sy4ud*v2d tx 3ctstem that

A. absorbs 100% of the light incident upon it, but cannot emit light of its own (i.e., a "black" body).

B. emits 100% of the light it generates, but cannot absorb radiation of its own.

C. either absorbs 100% of the light incident upon it, or emits 100% of the radiation it generates.

D. absorbs 50% of the light incident upon it, and emits 50% of the radiation it generates.

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which color in the visible spectrum is associshy-j e.;r(z 6udg1xz ated with the lowest temperature?

A. blue

B. green

C. orange

D. red

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Planck's constant

A. sets an upper limit to the amount of energy that can be absorbed or emitted.

B. sets a lower limit to the amount of energy that can be absorbed or emitted.

C. relates mass to energy.

D. none of the given answers

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The ratio of energy a lsho2w7 *3 tud m))sh-ybv(tto frequency for a given photon gives

A. its amplitude.

B. its velocity.

C. Planck's constant.

D. its work function.

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The fundamental SI units of Planck's constant agt/oia)t7y;n0mko a2 re

A. $kg \cdot m/s$.

B. $kg \cdot m^{2}/s$.

C. $kg \cdot m/s^2$.

D. $kg \cdot m^{2}/s^2$.

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Planck's constant has a value oh 1 ew .cq-7zau+z0 2jmmghj.ff

A. $1.055 \times 10^{-34} \; J \cdot s$.

B. $6.626 \times 10^{-34} \; J \cdot s$.

C. $8.85 \times 10^{-12} \; J \cdot s$.

D. $8.988 \times 10^{9} \; J \cdot s$.

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A photon is a particle w;6idj jmp-6o0dtofm/7jn)as9v 2ai that

A. has zero electric charge.

B. has zero electric field associated with it.

C. cannot travel in a vacuum.

D. has a velocity in a vacuum that varies with the photon frequency.

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9#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which of the followingynx5,z) u- rdg is an accurate statement?

A. In vacuum, ultraviolet photons travel faster than infrared photons.

B. Photons can have positive or negative charge.

C. An ultraviolet photon has more energy than an infrared photon.

D. Photons do not have momentum (i.e., they cannot exert pressure on things).

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10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What is a photon?

A. an electron in an excited state

B. a small packet of electromagnetic energy that has particle-like properties

C. one form of a nucleon, one of the particles that makes up the nucleus

D. an electron that has been made electrically neutral

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11#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The energy of a photon dedd1o.tx8ey k2h3f3 mzt 3;7iq cfpa6opends on

A. its amplitude.

B. its velocity.

C. its frequency.

D. none of the given answers

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12#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

If the wavelength of a photon im j7u 76uy/p( beybi-qs halved, by what factor does its energy change?

A. 4

B. 2

C. 1/4

D. 1/2

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13#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which color of light has the lowest du7.62i*uf8t po:wf r jos ke(energy photons?

A. red

B. yellow

C. green

D. blue

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14#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The photoelectric effect is explaina.hdn-mxc3h6hdiv o1cy+s4 n i n23-gsble assuming

A. that light has a wave nature.

B. that light has a particle nature.

C. that light has a wave nature and a particle nature.

D. none of the above

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15#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In order for a photon to eject ata e*4).z kxwan electron from a metal's surface in the photoelectric effect, the photon'z)*a4txe. ak ws

A. frequency must be greater than a certain minimum value.

B. speed must be greater than a certain minimum value.

C. wavelength must be greater than a certain minimum value.

D. momentum must be zero.

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16#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The kinetic energy of the photoelectron v /pqvrtsf u 3f+w.x67ym)k 5edepends on which of the following?

A. intensity of light

B. duration of illumination

C. wavelength of light

D. angle of illumination

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17#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A beam of red light and a beam of violet light each deliver the same power on a g4p 75 ehz4xd:n p:iddsurface. For which i z:4en: dp5gd 4x7dphbeam is the number of photons hitting the surface per second the greatest?

A. the red beam

B. the violet beam

C. The number of photons per second is the same for both beams.

D. This cannot be answered without knowing just what the light intensity is.

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18#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A metal surface is illumin--jpiw+m kxbscmz2byl/jqn x1j84( b5 yp5; qated with blue light and electrons are ejected at a given rate each with a certain amount of energy. If the inqb1mmz+c-s w npk4xb x5l(jp j5ij /b-y;y8q2tensity of the blue light is increased, electrons are ejected

A. at the same rate, but with more energy per electron.

B. at the same rate, but with less energy per electron.

C. at an increased rate with no change in energy per electron.

D. at a reduced rate with no change in energy per electron.

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19#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A beam of X-rays of frequency f is incident upon a substance that scpfh8 ihqqj(se- (1t; vc/4pdfatters the beam in various directions. If wecp1/ds ffq48;iqhph j- v t((e measure the frequency of the scattered X-rays, we will find

A. X-rays with frequency less than f.

B. X-rays with frequency greater than f.

C. only X-rays with frequency f.

D. X-rays with frequencies ranging from less than f to greater than f.

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20#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A beam of X-rays of watcdf5 9k2 k7pyvelength l is incident upon a substance that scatters the b9fytk72kp 5dceam in various directions. If we measure the wavelength of the scattered X-rays, we will find

A. X-rays with wavelength less than l.

B. X-rays with wavelength greater than l.

C. only X-rays with wavelength l.

D. X-rays which range in wavelength from less than l to greater than l.

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21#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

When a photon is scattered from an electron, there will be an increa ,xygd,bes3u8wp ,agb6 k(.m bse in its

A. energy.

B. frequency.

C. wavelength.

D. momentum.

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22#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In the Compton effect, as the scattering angle increases, trufrf,kvp9 .h lp)a 86he frequency of the X-rays scattered 6,8rl.kvuf 9)appfr hat that angle

A. increases.

B. decreases.

C. does not change.

D. varies randomly.

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23#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In a Compton scattering x7m-k6y v,gcygu.+ noexperiment, what scattering angle produces the greatest change in wavelg7g, vomyxyn-6 c+. ukength?

A. $0^{\circ}$

B. $90^{\circ}$

C. $180^{\circ}$

D. none of the given answers

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24#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

When the accelerating voltage in an X-ray tube is doubled, the minimummmj61;mfl xr:hpv i -1 wavelength fx v1- hmmm6:rpij1l;of the X-rays

A. is increased to twice the original value.

B. is increased to four times the original value.

C. is decreased to one-half the original value.

D. is decreased to one-fourth the original value.

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25#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

When a proton passes through matter, it is possible for it to interact w hwc u40-4wzspdrxbjal 0r 1ec(j6. ffy2,g v(ith the matter in such a way that an electron and a positron are produced; thisb4cdsg fcv. ,-(jw fl2jp6rxr401 yuz 0w e(ha interaction is referred to as

A. the photoelectric effect.

B. the Compton effect.

C. pair production.

D. none of the given answers

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26#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

As a particle travels faster, its de Broglie wavelej4a1*2 9lf.xrd m3uac3wxa eingth

A. increases.

B. decreases.

C. remains constant.

D. could be any of the given answers; it depends on other factors.

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27#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

When an electron is acceleratel ;il i: /oklxv udbgm9z-y,6;msm;)id to a higher speed, there is a decrease in its

A. energy.

B. frequency.

C. wavelength.

D. momentum.

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28#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which one of the following would s)s,a/3 tgka pt12bw atend to have the smallest wavelength if they are moving with thes,a2a s3t pbwg)ta/1k same speed?

A. electron

B. proton

C. baseball

D. bowling ball

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29#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The reason the wavelike nature of a moving baseball is not noticed ici z-fdt 2)2j0sgmcm;n everyday life is thatdcz;c2mmts2g-i j) 0f

A. it doesn't have a wavelike nature.

B. its wavelength is too small.

C. its frequency is too small.

D. its energy is too small.

E. No one pays attention to such things except for the Mets; and they can't hit a curve ball anyway.

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30#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What advantage might an electron microscope have over a light mbiw9* -qny2xf 2 t2b2tma3ooiicroscope?

A. Electrons are more powerful.

B. Shorter wavelengths are possible.

C. Longer wavelengths are possible.

D. none of the given answers

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31#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The part of an electron microscope tztoxd. w(a:, 8qz j:axjqhl 5(hat plays the same role as the lenses do in anlx .t8jzz,:d5aqwax o (( hqj: optical microscope is

A. the vacuum chamber.

B. the coils.

C. the cathode.

D. the deflector plates.

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32#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

Which of the following microscopes is capable of "photograkobc+wcf fgr)c,ikf575sig )*7 ayj6phing" individual atomsjrwf65 ) fbc*7k cf)i 7yg5gocsia, +k?

A. light microscope

B. scanning tunneling microscope

C. transmission electron microscope

D. scanning electron microscope

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33#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

According to the Bohr model of the atom, the angular mz42 s: m/va wh yuq glpa4d-:x.kz*m8aomentum of an electron around t a/a4v.4 *k 2x wg-dmyu:z zqm8lsa:hphe nucleus

A. could equal any positive value.

B. must equal an integral multiple of h.

C. must equal an integral multiple of h/2p.

D. decreases with time, eventually becoming zero.

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34#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

When an electron jumps from an orbit where n = 4 tocc-e )cd8emj* eh/:ci one where n = 2

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35#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The distance between adjacent orbit h 1ojw*e1)/;+og;yllbqxp jmgb:b0z radii in a hydrogen atom

A. increases with increasing values of n.

B. decreases with increasing values of n.

C. remains constant for all values of n.

D. varies randomly with increasing values of n.

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36#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The energy difference between adjacent orbit radii in a hydrogbhps;.d6dc x. en atom

A. increases with increasing values of n.

B. decreases with increasing values of n.

C. remains constant for all values of n.

D. varies randomly with increasing values of n.

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37#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What is the wavelengt)bnnjb ;768 q oxd4ttlh corresponding to the most intense light emitted by a giant star of surfacl4;j6 tbonntb)xqd 87e temperature 5000 K?

A. $576 \; nm$

B. $578 \; nm$

C. $580 \; nm$

D. $582 \; nm$

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38#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What is the frequency of the most e 0fcxplzu+m)pe8c, j: aws2)ni-u)cintense radiation from an object with temperature 2pnzs) j,xee aw)c ifcu-8p) l0uc:+m$100 ^{\circ}C$?

A. $2.9 \times 10^{-5} \; Hz$

B. $3.9 \times 10^{13} \; Hz$

C. $1.0 \times 10^{13} \; Hz$

D. $1.0 \times 10^{11} \; Hz$

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39#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

How much energy is carr9w(ghc, ok8 vwied by a photon with frequency 110 GHz?

A. $1.1 \times 10^{-20} \; J$

B. $1.4 \times 10^{-22} \; J$

C. $7.3 \times 10^{-23} \; J$

D. $1.3 \times 10^{-25} \; J$

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40#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

How much energy is carried by a photon with a freqhr+*ll,owjmdy )cz*rq.vlea r 3k e,p(x294yuency of 100,000 GHz?

A. $4.73 \times 10^{-42} \; J$

B. $4.37 \times 10^{-24} \; J$

C. $6.63 \times 10^{-24} \; J$

D. $6.63 \times 10^{-20} \; J$

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41#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What frequency of electromagnetitysa( 6/:q+ j6cnyt9aum vnd /c radiation has energy $4.7 \times 10^{-25} \; J$?

A. $710 \; kHz$

B. $4.7 \; MHz$

C. $710 \; MHz$

D. $1.4 \; GHz$

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42#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What frequency of electromagnetic radiation has an energy lmqs0(. 4wp.fxl,25 n uhbwmeof 58.1 meV?

A. $1.4 \; MHz$

B. $711 \; MHz$

C. $7.1 \; GHz$

D. $14 \; GHz$

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43#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What is the photon enerti r+m 4wg.ilau7x-,igy of red light having wavelength 640 nm?

A. $1.13 \times 10^{-19} \; J$

B. $1.31 \times 10^{-19} \; J$

C. $3.11 \times 10^{-19} \; J$

D. $1.94 \times 10^{-19} \; J$

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44#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

How much energy, in jou5ps; q fo5ji7yw8eg xsc;*f 4zles, is carried by a photon of wavelength 660 nm?

A. $1.46 \times 10^{-48} \; J$

B. $3.01 \times 10^{-19} \; J$

C. $6.63 \times 10^{-34} \; J$

D. none of the given answers

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45#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

At what rate are photons emitte3pv, cv3z1yta.4vo r kg3f0 zgd by a 50-W sodium vapor lamp? (Assume that the lamp's light ig0g3or .v,y 1v3zzt kca3pvf4s monochromatic and of wavelength $589 \; nm$.)

A. $1.0 \times 10^{20}/$s

B. $1.5 \times 10^{20}/$s

C. $2.0 \times 10^{20}/$s

D. $2.5 \times 10^{20}/$s

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46#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A metal has a work function of 4.5 eV.f68l :w d)yhdo2 8evgs Find the maximum kinetic energy of the photoelectrons if the w6hgolsyf828 w): e dvdavelength of light is 250 nm.

A. zero

B. $0.37 \; eV$

C. $0.46 \; eV$

D. $0.53 \; eV$

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47#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

When light of wavelenvvyo( op6 ,-jhgth 350 nm is incident on a metal surface, the stopping potential of the photoelectrons is 0.500 eV. What is the w-(vv,oy6op hjork function of the metal?

A. $0.500 \; eV$

B. $3.04 \; eV$

C. $3.54 \; eV$

D. $4.12 \; eV$

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48#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

When light of wavelength 350 nm is incident on a metal surface, the stoppwh8. g1 1 dakdrm75czning potential of the photoelectrons is 0.500 eV. What is the thresholdz g.mak5dc1ndr781 wh frequency?

A. $3.47 \times 10^{14} \; Hz$

B. $3.74 \times 10^{14} \; Hz$

C. $4.73 \times 10^{14} \; Hz$

D. $7.34 \times 10^{14} \; Hz$

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49#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

When light of wavelength cfrz+w6zpvb /humx-*/ c7xe, 350 nm is incident on a metal surface, the stopping potential ofbwfm/p*zcr/e 6h z-vc+xux7, the photoelectrons is 0.500 eV. What is the maximum kinetic energy of the electron?

A. $0.500 \; eV$

B. $3.04 \; eV$

C. $3.54 \; eV$

D. $4.12 \; eV$

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50#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A monochromatic light is i4(1hnod f d4*bpa h)ws7y;fds ncident on the surface of a metal with work function 2.50 eV. If a 1.0-V stopping potential is required to make the photocurrent zero, what is the wavelength of lig7w s;hbd)h (ys* ff4p1 dnda4oht?

A. $354 \; nm$

B. $423 \; nm$

C. $497 \; nm$

D. $744 \; nm$

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51#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

If the scattering angle in Compton's scattering is 90e. What iaep vnlpv)dybj3cw1d pp1m5 3)4mr( /s the wavelength shift?(c13p va )drmym5p/e14pndb lj3)p vw

A. $1.22 \times 10^{-12} \; m$

B. $2.43 \times 10^{-12} \; m$

C. $3.65 \times 10^{-12} \; m$

D. $4.85 \times 10^{-12} \; m$

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52#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

X-rays of wavelength 0.20 nm are scattered by a metal. The wavelength sh t/sh9nv1yb vjl9(2m-g*t lsxift is observed h 1vm/*vlx(ytl99 b gsj n2ts-to be
$2.1 \times 10^{-12} \; m$ at a certain scattering angle measured relative to the incoming X-ray. What is the scattering angle?

A. $20^{\circ}$

B. $40^{\circ}$

C. $60^{\circ}$

D. $80^{\circ}$

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53#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

X-rays with a wavelength of 0.00100*mmgrxz t/uv,ce)j 45 nm are scattered by free electrons at 130e. What is the kinetic energy of each rec/j4,*zur)t5cg exvmm oil electron?

A. $2.5 \; MeV$

B. $5.0 \; MeV$

C. $7.5 \; MeV$

D. $10 \; MeV$

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54#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What is the wavelength of the matter wave associated with a ball of mass 73( weelx e0c)kw;2e ,ntotm-frn /sn0.50 kg t xfe e wo23-;(,sel0nec/rw7t) kmnnmoving with a speed of 25 m/s?

A. $3.5 \times 10^{-35} \; m$

B. $5.3 \times 10^{-35} \; m$

C. $3.5 \times 10^{-33} \; m$

D. $5.3 \times 10^{-33} \; m$

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55#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What is the de Broglie wavelength of a7om:a mq.)dl mkk joc3d(z+2ba x.dt3 ball of mass 200 g moving with a speed of :+o a.al2dbxjd3kzcom)m3kq d7. mt( 30 m/s?

A. $1.1 \times 10^{-34} \; m$

B. $2.2 \times 10^{-34} \; m$

C. $4.5 \times 10^{-28} \; m$

D. $6.7 \times 10^{-27} \; m$

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56#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What is the wavelength of the mattef62jzj 07u1dt;hp vijcs,kb3r wave associated with an electron moving with a spec fv 30 b2 6d7sj1j;tuhijpk,zed of $2.5 \times 10^7 \; m/s$?

A. $29 \; pm$

B. $35 \; pm$

C. $47 \; pm$

D. $53 \; pm$

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57#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An electron is accelerated through a potential difference of 150 V. What ishgbif9sja. 4gw -3l(f its wavel-.3iglf 4hfg wj9a(bs ength?

A. $0.1 \; nm$

B. $1 \; nm$

C. $1 \; mm$

D. $1 \; cm$

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58#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An electron is accelerated by a poten3ohsyy5b:p jq-7hjo wbrl2/9tial difference of 100 V. What is its wavelength-bhy o9b5q/ j2h3sylj orw:p7 ?

A. $0.122 \; nm$

B. $0.212 \; nm$

C. $0.221 \; nm$

D. $0.313 \; nm$

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59#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An electron is accelerated by a potential difference of 100 V. What is its mfvw4 +m8e;:bus /wp(: fya nmmomenfm4;ew +u( s fm :aymwn8p/vb:tum in $kg \cdot m/s$?

A. $3.45 \times 10^{-24}$

B. $3.54 \times 10^{-24}$

C. $4.53 \times 10^{-24}$

D. $5.43 \times 10^{-24}$

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60#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An electron is accelerated by a potential difnb-:x7 sxwbpaq ( /q;n3oxztvtm )t48ference of 100 V. What is its kinetic e4n)b3vqqb x tm/z;t on78taw x(-pxs: nergy?

A. $1.26 \times 10^{-17} \; J$

B. $1.62 \times 10^{-17} \; J$

C. $2.16 \times 10^{-17} \; J$

D. $2.61 \times 10^{-17} \; J$

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61#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A person of mass 50 kg has a wa8l7fnh6zms3 qvelength of $4.4 \times 10^{-36} \; m$ when running. How fast is she running?

A. 2.0 m/s

B. 3.0 m/s

C. 4.0 m/s

D. 5.0 m/s

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62#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An electron has a wavelength of 0.123 nm. What is its avxzszh69b*nt6sq r esq ((1( 74cbd f*e3ufdenergy in eV? (This energr13s q*x(zva u6 6bz74( ch*dntefs(fsq9b edy is not in the relativistic region.)

A. $20 \; eV$

B. $60 \; eV$

C. $80 \; eV$

D. $100 \; eV$

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63#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

If $r_1$ is the smallest orbital radius around a single proton, then $r_6$ is equal to

A. $36 r_1$.

B. $12 r_1$.

C. $6 r_1$.

D. $2.45 r_1$.

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64#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The electron of a hydrogen atom makes a tran2m dwaxps- 86nsition from the n = 5 state to the n = 2 state. What is the wavelength of the emitted wmn8d62-axps photon?

A. $344 \; nm$

B. $434 \; nm$

C. $443 \; nm$

D. $523 \; nm$

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65#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The binding energy of the hydrogen atom in its ground state pr/7)xex;q r+sb 1; zk1dktll is -13.6 eV. What is the energy whenkblsp ;/ 1rqz ;e7xr1)kt+d xl it is in the n = 5 state?

A. $2.72 \; eV$

B. $-2.72 \; eV$

C. $0.544 \; eV$

D. $-0.544 \; eV$

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66#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

A hydrogen atom in the gr+d5s.1 lok/c dzve ,g9gns /7x r0bciround state absorbs a photon of energy 12.09 eV. To which state will the electron make a transi7/5z slcd9nd .v/ segoxi rb +0gr1c,ktion?

A. n = 2

B. n = 3

C. n = 4

D. n = 5

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67#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What is the ionization energy of thnoa8*gk + )7kldtqe+we neutral hydrogen atom?

A. $27.2 \; eV$

B. $13.6 \; eV$

C. $6.8 \; eV$

D. none of the given answers

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68#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

What is the ionization energy of singly ionized h.5 ntfec3pe -melium?

A. $54.4 \; eV$

B. $27.2 \; eV$

C. $13.6 \; eV$

D. none of the given answers

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69#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In making a transition from state n = 1 to state n = 20p: zo- zqcq,y, the hydrogen atom must

A. absorb a photon of energy 10.2 eV.

B. emit a photon of energy 10.2 eV.

C. absorb a photon of energy 13.58 eV.

D. emit a photon of energy 13.58 eV.

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70#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

In state n = 1, the energy of the hydrogej(y9ozz o/msh7 nrl0:+kzcd+ n atom is -13.58 eV. What is its energy in state n =nd (+zr m/ l+ozh9oys:z0kj 7c 2?

A. -6.79 eV

B. -4.53 eV

C. -3.40 eV

D. -1.51 eV

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71#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

The wavelength of a ruby laser is 694.3 nwwq2m4k n-dl)9nsh ay:n nz( 1m. What is the energy difference between the two energy1wh -n)q way2z94 ndk(s mn:nl states involved in laser action?

A. $1.537 \; eV$

B. $1.646 \; eV$

C. $1.786 \; eV$

D. $1.812 \; eV$

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72#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An electron is moving about a single proton in an ord( 6tg(9kebgrruk ah wzogc7 t j927;3bit characterized by n = 4. How many of the electron's de Broglie wavelengths fit into the cik;g tzra wr9dgg(ob26c93h7(k jtue 7rcumference of this orbit?

A. 1

B. 2

C. 4

D. 16

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