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Chapter 38: Q 11 (page 1113)
If an electron is in a stationary state of an atom, is the electron at rest? If not, what does the term mean?
No, the electron is not at rest.
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a. Explain why the graphs of Figure 38.3 are mostly horizontal for 鈭哣 > 0.
b. Explain why photoelectrons are ejected from the cathode with a range of kinetic energies, rather than all electrons having the same kinetic energy.
c. Explain the reasoning by which we claim that the stopping potential Vstop indicates the maximum kinetic energy of the electrons
At what speed is an electron's de Broglie wavelength (a) , (b) , (c) , and (d) ?
You need to design a photodetector that can respond to the entire range of visible light. What is the maximum possible work function of the cathode?
A 75 kW radio transmitter emits 550 kHz radio waves uniformly in all directions. At what rate do photons strike a 1.5-m-tall, 3.0-mm-diameter antenna that is 15 km away?
a. Determine the energy, in eV, of a photon with a 550 nm wavelength.
b. Determine the wavelength of a 7.5 keV x-ray photon.
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