Question

give the definition of intensity of light in Photoelectric effect​

Answer 1

Explanation:

In the photoelectric effect, light incident on the surface of a metal causes electrons to be ejected. ... the number of electrons (i.e. the electric current) is proportional to the intensity and independent of the frequency of the incident radiation above the threshold value of ν0 (no current is observed below ν0).....

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Answer 2

To attract ejected electron from C towards collector A, the collector A is maintained at a positive potential with respect to emitter C. The intensity of light is varied, keeping the frequency of the incident radiation and

the accelerating potential fixed and the resulting photoelectric current is measured each time. It is observed

that the photocurrent increases linearly with intensity of incident light as shown in the figure.

As we know the photo current is directly proportional to the number of photoelectrons emitted per second, so

the number of photo electrons emitted per second is directly proportional to the intensity of the incident radiations.

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