When light of a certain frequency is incident on a metal surface, no photoelectrons are...
PHYSICS
JAMB 2023
When light of a certain frequency is incident on a metal surface, no photoelectrons are emitted. If the frequency of the light is increased, what happens to the stopping potential?
- A. The stopping potential does not change.
- B. The stopping potential decreases.
- C. The stopping potential can either increase or decrease, depending on the intensity of the light.
- D. The stopping potential increases.
Correct Answer: D. The stopping potential increases.
Explanation
The stopping potential is the voltage that is required to stop the emitted photoelectrons from reaching the anode. When the frequency of the light is increased, the kinetic energy of the emitted photoelectrons also increases. This means that a higher stopping potential will be required to stop the photoelectrons from reaching the anode.
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