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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsAtomic structureMedium2 minQB

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A photon of energy 10.2 eV corresponds to light of wavelength $λ_{0}$ . Due to an electron transition from $n = 2$ to $n = 1$ in a hydrogen atom, light of wavelength $λ$ is emitted. If we take into account the recoil of the atom when the photon is emitted:

Options:

Answer:

Solution:

With recoil, a part of the 10.2 eV transition energy goes into the kinetic energy of the recoiling atom, so the photon carries slightly less than 10.2 eV and $λ > λ_{0}$ .

Subject:PhysicsTopic:Modern PhysicsSubtopic:Atomic structure

⏱ 2mℹ️ Source: QB

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