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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsPhotoelectric effectEasy2 minPYQ_2020

PhysicsEasysingle choice

Calculate the momentum transferred to a surface when a radiation of energy $E$ falls normally on it. Assume that the reflectivity of the surface is unity.

Options:

Answer:

Solution:

$P_{initial} = \frac{E}{c}$

$P_{final} = - \frac{E}{c}$

The change in momentum is the impulse, which is the momentum transferred to the surface

$∆ P = P_{final} - P_{initial} = \frac{E}{c} - (- \frac{E}{c}) = \frac{2 E}{c}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: PYQ_2020

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