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Question

According to Einstein's photoelectric equation, the graph between the kinetic energy of the photoelectrons ejected and the frequency of the incident radiation is:

A
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B
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C
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Solution

The correct option is C
Kinetic energy (K.E.) is directly proportional to the frequency (ν) of the incident radiation, but the ejection of electrons take place only when the frequency of the incident radiation is greater than the threshold frequency.
So, when the threshold frequency is reached, K.E. increases linearly with increase in the incident radiation frequency.

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