Chapter 38: Q. 22 (page 1114)
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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’s velocity in ?
In the atom interferometer experiment of Figure , laser cooling techniques were used to cool a dilute vapor of sodium atoms to a temperature of . The ultracold atoms passed through a series of collimating apertures to form the atomic beam you see circling the figure from the left. The standing light waves were created from a laser beam with a wavelength of .
a. What is the rms speed of a sodium atom in a gas at temperature ?
b. By treating the laser beam as if it were a diffraction grating. Calculate the first-order diffraction angle of a sodium atom traveling at the rms speed of part a.
c. how far apart are the points and if the second sanding wave is from the first?
d. Because interference is observed between the two paths, each individual atom is apparently present at both points and point Describe, in your own words, what this experiment tells you about the nature of matter.
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?
a. What quantum number of the hydrogen atom comes closest to giving a 100-nm-diameter electron orbit?
b. What are the electron’s speed and energy in this state?
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
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