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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsAtomic structureEasy2 minPYQ_2020

PhysicsEasysingle choice

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

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Answer:

Solution:

$\frac{1}{λ} = R [1 - \frac{1}{25}] = \frac{24 R}{25}$

Momentum is,

$∴$ $P = \frac{h}{λ} = \frac{24 R h}{25} = 6.9 \times 1 0^{- 27} kg m s^{- 1}$

$∴$ $v = \frac{P}{m} = \frac{6.9 \times 1 0^{- 27}}{1.6 \times 1 0^{- 27}} \approx 4 m s^{- 1}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Atomic structure

⏱ 2mℹ️ Source: PYQ_2020

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