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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
(d) : According to Einstein's photoelectric equation
`K_(max)=hv-hv_(0)`
Since `K_(max)` is positive, the photoelectric emission occurs only if
`hvgthv_(0) or vgtv_(0)`
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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