NEET Physics Question - Modern Physics - Photoelectric Effects and deBroglie Equation

Assertion (A): In photoelectric effect, the number of photoelectrons emitted is always equal to number of photons incident.

Reason (R): All the photons falling on the surface will eject photoelectrons.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

The number of emitted photoelectrons is generally less than the number of incident photons due to quantum efficiency and reflection losses. Photons can only eject electrons if their energy \(\text{h}\nu\) exceeds the work function \(\phi\). Both assertion (A) and reason (R) are false.

Rankers Physics

Photoelectron Emission Ratio

Solution:

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