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Chapter 38: Q. 2 (page 1114)
How many photoelectrons are ejected per second in the experiment represented by the graph of FIGURE EX38.2?
There arephoto electrons are ejected per seconds.
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Compton scattering is relevant not only to -ray photons but, even more so, to higher energy gamma-ray photons. Suppose a gamma-ray photon backscatter (i.e., is scattered back toward the source) from a free electron. Afterward, what is the electron鈥檚 velocity in ?
An FM radio station broadcasts with a power of 10 kW at a frequency of 101 MHz.
a. How many photons does the antenna emit each second?
b. Should the broadcast be treated as an electromagnetic wave or discrete photons? Explain.
In a photoelectric-effect experiment, the stopping potential was measured for several different wavelengths of incident light. The data are as follows:
Use an appropriate graph of the data to determine
(a) the metal used for the cathode and
(b) an experimental value for Planck鈥檚 constant .
20.What is the quantum number of an electron confined in a 3.0-nm-long one-dimensional box if the electron's de Broglie wavelength is ?
I The allowed energies of a simple atom are
a. Draw the atom's energy-level diagram. Label each level with the energy and the quantum number.
b. What wavelengths appear in the atom's emission spectrum?
c. What wavelengths appear in the atom's absorption spectrum?
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