21. Kinetic Theory of Ideal Gases
Average Kinetic Energy of Gases
3:47 minutes
Problem 37.96
Textbook Question
Textbook QuestionA rubidium atom (m = 85 u) is at rest with one electron in an excited energy level. When the electron jumps to the ground state, the atom emits a photon of wavelength ⋋ = 780 nm. (b) The recoil speed sets the lower limit on the temperature to which an ideal gas of rubidium atoms can be cooled in a laser-based atom trap. Using the kinetic theory of gases (Chapter 18), estimate this “lowest achievable” temperature.
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