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Photoelectric emission occurs only when ...

Photoelectric emission occurs only when the incident light has more than a certain minimum

A

power

B

wavelength

C

intensity

D

frequency

Text Solution

Verified by Experts

The correct Answer is:
D
According to Einstein.s photoelectric equation
`K_("max") = hupsilon - hupsilon_0`
 Since Kmax is tve, the photoelectric emission occurs only if  hu > huo or v> 00 The photoelectric emission occurs only when the incident light has more than a certain minimum frequency. This minimum frequency is called threshold frequency.
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