A 9-W laser beam shines on an ensemble of 1024 electrons, each in the ground state of a
Chapter 35, Problem 52(choose chapter or problem)
A 9-W laser beam shines on an ensemble of 1024 electrons, each in the ground state of a one-dimensional infinite square well 0.72 nm wide. The photon energy is just high enough to raise an electron to its first excited state. How many electrons can be excited if the beam shines for 10 ms?
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