First slide

Photoelectric effect and study of photoelectric effect

Question

If the intensity of radiation incident on a photocell be increased four times, then the number of photoelectrons and the energy of photoelectrons emitted respectively become

Moderate

A

four times, doubled
B

doubled, remains unchanged
C

remains unchanged, doubled
D

four times, remains unchanged

Solution

Since the number of photoelectrons emitted is directly proportional to the intensity of incident radiation, the number of photoelectrons emitted becomes four times.
The energy of photoelectrons does not change with the intensity light.

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