Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsPhotoelectric effectMedium2 minQB

PhysicsMediumsingle choice

We have a photon and an electron of same energy $E = 1 0^{5} eV$ . The ratio of their momentum is

Answer:

Solution:

$p_{γ} = \frac{E}{c}$

For electron kinetic energy E,

$p_{e} c = E (E + 2 m c^{2})$

$\frac{p _{γ}}{p _{e}} = \frac{1 0 ^{5}}{1 0 ^{5} + 2 ( 5.11 \times 1 0 ^{5} )} ≃ 0.299$

The nonrelativistic value is 0.313; both select the nearest option, 1/3.

Stream:JEESubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: QB

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