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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsAtomic structureMedium2 minQB

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When a stationary hydrogen atom emits a photon in going from $n = 5$ to $n = 1$ , its recoil speed is about

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Solution:

$v = \frac{E _{γ}}{m _{H} c} = \frac{13.6 ( 1 - 1/25 ) \times 1.6 \times 1 0 ^{- 19}}{1.67 \times 1 0 ^{- 27} \times 3 \times 1 0 ^{8}} \approx 4.2 m / s \approx 4 m / s$ .

Subject:PhysicsTopic:Modern PhysicsSubtopic:Atomic structure

⏱ 2mℹ️ Source: QB

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