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Basic Physics Practice Test: Early Quantum Theory and Models of the Atom
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Basic Physics Practice Test: Early Quantum Theory and Models of the Atom
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25 Questions

1. If the wavelength of a photon is halved, by what factor does its energy change?
2. What frequency of electromagnetic radiation has an energy of 58.1 meV?
3. An electron has a wavelength of 0.123 nm. What is its energy in eV? (This energy is not in the relativistic region.)
4. In the Compton effect, as the scattering angle increases, the frequency of the X-rays scattered at that angle
5. The ratio of energy to frequency for a given photon gives
6. The kinetic energy of the photoelectron depends on which of the following?
7. What is the ionization energy of singly ionized helium?
8. In making a transition from state n = 1 to state n = 2, the hydrogen atom must
9. What is the ionization energy of the neutral hydrogen atom?
10. If r1 is the smallest orbital radius around a single proton, then r6 is equal to
11. The energy difference between adjacent orbit radii in a hydrogen atom
12. What is the frequency of the most intense radiation from an object with temperature 100e C?
13. A beam of red light and a beam of violet light each deliver the same power on a surface. For which beam is the number of photons hitting the surface per second the greatest?
14. A beam of X-rays of wavelength l is incident upon a substance that scatters the beam in various directions. If we measure the wavelength of the scattered X-rays, we will find
15. When the accelerating voltage in an X-ray tube is doubled, the minimum wavelength of the X-rays
16. When light of wavelength 350 nm is incident on a metal surface, the stopping potential of the photoelectrons is 0.500 eV. What is the work function of the metal?
17. What is a photon?
18. An electron is accelerated by a potential difference of 100 V. What is its kinetic energy?
19. Which of the following is an accurate statement?
20. A person of mass 50 kg has a wavelength of 4.4 ˛ 10-36 m when running. How fast is she running?
21. At what rate are photons emitted by a 50-W sodium vapor lamp? (Assume that the lamp's light is monochromatic and of wavelength 589 nm.)
22. What is the wavelength corresponding to the most intense light emitted by a giant star of surface temperature 5000 K?
23. When a proton passes through matter, it is possible for it to interact with the matter in such a way that an electron and a positron are produced; this interaction is referred to as
24. How much energy is carried by a photon with a frequency of 100,000 GHz?
25. A hydrogen atom in the ground state absorbs a photon of energy 12.09 eV. To which state will the electron make a transition?

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