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Chapter 31

Chapter 31. Light Quanta. A quantum of light is called a. proton. photon. phonon. None of the above. A quantum of light is called a. proton. photon. phonon. None of the above. Which of these are quantized?. Electrons Photons Electric charge All of these.

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Chapter 31

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  1. Chapter 31 Light Quanta

  2. A quantum of light is called a • proton. • photon. • phonon. • None of the above.

  3. A quantum of light is called a • proton. • photon. • phonon. • None of the above.

  4. Which of these are quantized? • Electrons • Photons • Electric charge • All of these.

  5. Which of these are quantized? • Electrons • Photons • Electric charge • All of these.

  6. In the field of physics, a quantum • is a fundamental unit in nature. • is sometimes composed of subparts. • can vary with extreme conditions. • All of these.

  7. In the field of physics, a quantum • is a fundamental unit in nature. • is sometimes composed of subparts. • can vary with extreme conditions. • All of these.

  8. The ratio of a photon’s energy to its frequency is • its speed. • its wavelength. • its amplitude. • Planck’s constant.

  9. The ratio of a photon’s energy to its frequency is • its speed. • its wavelength. • its amplitude. • Planck’s constant.

  10. Planck’s constant h is • a proportionality constant similar to the more familiar constant p. • the ratio of energy per frequency for a photon. • a basic constant of nature. • All of these.

  11. Planck’s constant h is • a proportionality constant similar to the more familiar constant p. • the ratio of energy per frequency for a photon. • a basic constant of nature. • All of these.

  12. The photoelectric effect occurs when light that hits a surface ejects • photons. • electrons. • Both of these. • None of these.

  13. The photoelectric effect occurs when light that hits a surface ejects • photons. • electrons. • Both of these. • None of these. Comment: Don’t confuse the ejection of electrons with the emission of photons.

  14. During the photoelectric effect, brighter light causes the emission of • more electrons. • more energetic electrons. • ultraviolet light. • a higher work function in the metal surface.

  15. During the photoelectric effect, brighter light causes the emission of • more electrons. • more energetic electrons. • ultraviolet light. • a higher work function in the metal surface.

  16. The kinetic energy of electrons ejected during the photoelectric effect depends on the • brightness of illuminating light. • frequency of illuminating light. • speed of illuminating light. • sensitivity of the surface.

  17. The kinetic energy of electrons ejected during the photoelectric effect depends on the • brightness of illuminating light. • frequency of illuminating light. • speed of illuminating light. • sensitivity of the surface.

  18. The photoelectric effects supports the view that light is composed of • waves. • particles. • Both of these. • None of these.

  19. The photoelectric effects supports the view that light is composed of • waves. • particles. • Both of these. • None of these.

  20. Which of these best illustrates the dual nature of light? • Light travels as a wave and hits like a particle. • Light travels as a particle and hits like a wave. • Both of these say much the same thing. • None of these.

  21. Which of these best illustrates the dual nature of light? • Light travels as a wave and hits like a particle. • Light travels as a particle and hits like a wave. • Both of these say much the same thing. • None of these.

  22. The momentum of light is related to its • wavelength. • speed. • mass. • All of these.

  23. The momentum of light is related to its • wavelength. • speed. • mass. • All of these.

  24. The wavelength of a matter wave is • directly proportional to its momentum. • inversely proportional to its momentum. • theoretical only. • related to π.

  25. The wavelength of a matter wave is • directly proportional to its momentum. • inversely proportional to its momentum. • theoretical only. • related to π.

  26. The wavelength of an electron beam is of practical use in • a centrifuge. • an electron microscope. • electron and optical microscopes alike. • powerful magnifying glasses.

  27. The wavelength of an electron beam is of practical use in • a centrifuge. • an electron microscope. • electron and optical microscopes alike. • powerful magnifying glasses.

  28. The wavelengths of typical electron beams are • longer than wavelengths of light. • shorter than wavelengths of light. • nonexistent. • practical in ultrasound technology.

  29. The wavelengths of typical electron beams are • longer than wavelengths of light. • shorter than wavelengths of light. • nonexistent. • practical in ultrasound technology.

  30. Electron beams can undergo • diffraction. • interference. • Both of these. • None of these.

  31. Electron beams can undergo • diffraction. • interference. • Both of these. • None of these.

  32. Quantum uncertainties are relevant when trying to simultaneously measure the speed and location of • a baseball. • a spitball. • an electron. • All of these.

  33. Quantum uncertainties are relevant when trying to simultaneously measure the speed and location of • a baseball. • a spitball. • an electron. • All of these.

  34. According to the uncertainty principle, the more we know about a particle’s momentum, the less we know about its • kinetic energy. • mass. • location. • speed.

  35. According to the uncertainty principle, the more we know about a particle’s momentum, the less we know about its • kinetic energy. • mass. • location. • speed.

  36. Subatomic interactions described by quantum mechanics are governed by • laws of certainty. • laws of probability. • exact measurements. • All of these.

  37. Subatomic interactions described by quantum mechanics are governed by • laws of certainty. • laws of probability. • exact measurements. • All of these.

  38. In the quantum microworld, predictability depends on • having exact measurements. • knowledge of initial conditions. • pure chance and luck. • chaos.

  39. In the quantum microworld, predictability depends on • having exact measurements. • knowledge of initial conditions. • pure chance and luck. • chaos.

  40. A feature of chaotic systems is that small changes in initial conditions • lead to small differences later. • lead to big differences later. • may lead to big differences later. • have little or no relation to small or big differences later.

  41. A feature of chaotic systems is that small changes in initial conditions • lead to small differences later. • lead to big differences later. • may lead to big differences later. • have little or no relation to small or big differences later.

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