1. Chapter 24

2. 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

3. 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

4. Does a photon of red light have more energy or less energy than a photon of blue light? 1. More energy 2. Less energy

5. Does a photon of red light have more energy or less energy than a photon of blue light? 1. More energy 2. Less energy

6. 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.

7. 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.

8. 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. E C > E O > E H 2. E O > E C > E H 3. E H > E C > E O 4. E O > E H > E C 5. E H > E O > E C

9. 1. E C > E O > E H 2. E O > E C > E H 3. E H > E C > E O 4. E O > E H > E C 5. E H > E O > E C 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.

10. Chapter 24 Reading Quiz

11. 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.

12. 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.

13. Light consists of discrete, massless units called 1. quarks. 2. photons. 3. rotons. 4. muons. 5. phonons.

14. Light consists of discrete, massless units called 1. quarks. 2. photons. 3. rotons. 4. muons. 5. phonons.

15. 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.

16. 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.

17. 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.

18. 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.