CUET and UG exam CUET UG 2025 Mock Test Series Physics Dual Nature: Photon and Matter Waves The Photoelectric Effect
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Emission of electrons in photoelectric effect can be suppressed by applying a sufficiently negative electron potential to the photoemissive substance.
Reason (R) : A negative electric potential, which stops the emission of electrons from the surface of a photoemissive substance, varies linearly with frequency of incident radiation.
In the light of the above statements, choose the most appropriate answer from the options given below:
1
(A) is false but (R) is true.
2
(A) is true but (R) is false.
3
Both (A) and (R) are true and (R) is the correct explanation of (A).
4
Both (A) and (R) are true but (R) is not the correct explanation of (A).