A hydrogen atom at rest in the laboratory emits the paschen


A hydrogen atom at rest in the laboratory emits the Paschen ? radiation.

(a) Compute the recoil kinetic energy of the atom. (Hint: Use conservation of momentum.)

eV

(b) What fraction of the excitation energy of the n = 5 state is carried by the recoiling atom?

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Physics: A hydrogen atom at rest in the laboratory emits the paschen
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