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Chapter 38: Q 3 (page 1114)
Electrons in a photoelectric-effect experiment emerge from an aluminum surface with a maximum kinetic energy of 1.30 eV. What is the wavelength of the light?
Wavelength of the light is 222.35 nm
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Find the radius of the electron’s orbit, the electron’s speed, and the energy of the atom for the first three stationary states of
The maximum kinetic energy of photoelectrons is 2.8 eV. When the wavelength of the light is increased by 50%, the maximum energy decreases to 1.1 eV. What are (a) the work function of the cathode and (b) the initial wavelength of the light?
What is the energy, in keV, of 75 keV x-ray photons that are backscattered (i.e., scattered directly back toward the source) by the electrons in a target?
I What is the radius of a hydrogen atom whose electron is bound by ?
a. A negatively charged electroscope can be discharged by shining an ultraviolet light on it. How does this happen?
b. You might think that an ultraviolet light shining on an initially uncharged electroscope would cause the electroscope to become positively charged as photoelectrons are emitted. In fact, ultraviolet light has no noticeable effect on an uncharged electroscope. Why not?
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