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Chapter 24
The first-order diffraction of monochromatic x rays from
crystal A occurs at an angle of 20°. The first-order
diffraction of the same x rays from crystal B occurs at 30°.
Which crystal has the larger atomic spacing?
1. Crystal A
2. Crystal B
The first-order diffraction of monochromatic x rays from
crystal A occurs at an angle of 20°. The first-order
diffraction of the same x rays from crystal B occurs at 30°.
Which crystal has the larger atomic spacing?
1. Crystal A
2. Crystal B
Does a photon of red light have more energy or
less energy than a photon of blue light?
1. More energy
2. Less energy
Does a photon of red light have more energy or
less energy than a photon of blue light?
1. More energy
2. Less energy
A proton, an electron and an oxygen atom each pass at the
same speed through a 1-µm-wide slit. Which will produce
a wider diffraction pattern on a detector behind the slit?
1. The proton.
2. The electron.
3. The oxygen atom.
4. All three will be the same.
5. None of them will produce a diffraction pattern.
A proton, an electron and an oxygen atom each pass at the
same speed through a 1-µm-wide slit. Which will produce
a wider diffraction pattern on a detector behind the slit?
1. The proton.
2. The electron.
3. The oxygen atom.
4. All three will be the same.
5. None of them will produce a diffraction pattern.
A proton, an electron and an oxygen atom are each
confined in a 1-nm-long box. Rank in order, from
largest to smallest, the minimum possible energies of
these particles.
1.
2.
3.
4.
5.
EC > EO > EH
EO > EC > EH
EH > EC > EO
EO > EH > EC
EH > EO > EC
A proton, an electron and an oxygen atom are each
confined in a 1-nm-long box. Rank in order, from
largest to smallest, the minimum possible energies of
these particles.
1.
2.
3.
4.
5.
EC > EO > EH
EO > EC > EH
EH > EC > EO
EO > EH > EC
EH > EO > EC
Chapter 24
Reading Quiz
What did Balmer do?
1. Developed the mathematical theory of atomic
transitions.
2. Designed the first atomic spectrometer.
3. Fit the visible lines in the spectrum of hydrogen to a
simple formula.
4. Discovered that x rays are diffracted by crystals.
5. Proposed a relation between the frequency of an
electromagnetic wave and the energy of photons.
What did Balmer do?
1. Developed the mathematical theory of atomic
transitions.
2. Designed the first atomic spectrometer.
3. Fit the visible lines in the spectrum of hydrogen to
a simple formula.
4. Discovered that x rays are diffracted by crystals.
5. Proposed a relation between the frequency of an
electromagnetic wave and the energy of photons.
Light consists of discrete, massless units called
1.
2.
3.
4.
5.
quarks.
photons.
rotons.
muons.
phonons.
Light consists of discrete, massless units called
1.
2.
3.
4.
5.
quarks.
photons.
rotons.
muons.
phonons.
The first evidence for matter waves was found in the
1. de Broglie experiment.
2. Millikan experiment.
3. Einstein-Bohr experiment.
4. Davisson-Germer experiment.
The first evidence for matter waves was found in the
1. de Broglie experiment.
2. Millikan experiment.
3. Einstein-Bohr experiment.
4. Davisson-Germer experiment.
Which “particles” were seen in this chapter
to undergo interference and diffraction?
1. Electrons.
2. Atoms.
3. Neutrons.
4. Both 1 and 2.
5. All of 1, 2, and 3.
Which “particles” were seen in this chapter
to undergo interference and diffraction?
1. Electrons.
2. Atoms.
3. Neutrons.
4. Both 1 and 2.
5. All of 1, 2, and 3.