A metal surface is exposed to solar radiations. Which of the following is true?

Options

A. The emitted electrons have enegry less than a maximum value of enegry depending upon the frequency of the incident radiation.
B. The emitted electrons have energy less than a maximum value of enegry depending upon the intensity of the incident radiation.
C. The emitted electrons have zero enegry.
D. The emitted electrons have enegry equal to the enegry of photons of the incident light.

Answer

A

Explanation

According to Einstein's photoelectric effect equation,
`hv = hv_(0) +KE`
Maximum `KE = hv - hv_(0)`
Since `hv_(0)` is constant, the maximum `KE` is always less then a maximum value of energy `(hv)` depending upon the frequency of the incident radiation.