Assertion :The kinetic energy of photo-electrons increases with increase in frequency of incident light where $v > v_{0}$ . Reason: Whenever intensity of light is increased the number of photo-electron ejected always increases.

Read the above assertion and reason and choose the correct option regarding it.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is C Assertion is correct but Reason is incorrect
The kinetic energy of photo-electrons increases with increase in frequency of incident light where $v > v_{0}$ .
This is because energy is proportional to frequency: $E = h ν - h ν_{0}$
Whenever intensity of light is increased the number of photo-electron ejected increases, reaches a maximum value and remain constant.
Hence, Assertion is correct but Reason is incorrect.

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