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Chapter 38: Q 15 (page 1114)
55 keV x-ray photons are incident on a target. At what scattering angle do the scattered photons have an energy of 50 keV?
Scattering angle is equal to 86o.
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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?
If an electron is in a stationary state of an atom, is the electron at rest? If not, what does the term mean?
In the following Figure is an energy-level diagram for a simple atom. What wavelengths, in nm, appear in the atom’s (a) emission spectrum and (b) absorption spectrum?
17. What is the de Broglie wavelength of a neutron that has fallen in a vacuum chamber, starting from rest?
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?
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