The number of electrons emitted by a surface exposed to light is directly proportional to, (Provided frequency of incident light is greater than the threshold frequency of metal)

Frequency of light

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Work function

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Threshold wavelength

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Intensity of light

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Solution

The correct option is C Intensity of light
More is the Intensity of light, more is the number of photons falling on the surface of metal and more will be the number of electrons emitted.

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