Question

Assertion (A): Electrons are ejected from the surface of zinc when it is irradiated by yellow light.
Reason (R): Energy associated with a photon of yellow light is more than the work function of zinc.

• A. If both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
• B. If both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
• C. If Assertion (A) is true and Reason (R) is false.
• D. If both Assertion (A) and Reason (R) are false.

Hint:

The photoelectric effect occurs only if the incident light frequency is above the threshold frequency of the metal.

Answer 1

The Correct Option is D

Explanation of the Photoelectric Effect:
- The work function of zinc is greater than the energy of yellow light photons, meaning yellow light cannot eject electrons.
- Since the energy of yellow light is insufficient, Reason (R) is also false.
Thus, both Assertion (A) and Reason (R) are incorrect.