Question: The electron in a hydrogen atom makes a transition from the n = 4 state to the n = 2 state, as indicated in FIGURE

The electron in a hydrogen atom makes a transition from the n = 4 state to the n = 2 state, as indicated in FIGURE 31-41.

(a) Determine the linear momentum of the photon emitted as a result of this transition.

(b) Using your result to part (a), find the recoil speed of the hydrogen atom, assuming it was at rest before the photon was emitted.

Figure 31-41

Electron jump Momentum of atom Momentum of photon

Electron jump Momentum of atom Momentum of photon

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