A metal surface is exposed to solar radiations - Vidyadip

MCQ

A metal surface is exposed to solar radiations

✓
The emitted electrons have energy less than a maximum value of energy depending upon frequency of incident radiations
B
The emitted electrons have energy less than maximum value of energy depending upon intensity of incident radiation
C
The emitted electrons have zero energy
D
The emitted electrons have energy equal to energy of photos of incident light

✓

Answer

Correct option: A.

The emitted electrons have energy less than a maximum value of energy depending upon frequency of incident radiations

a
The emitted electrons have energy less than the maximum value of energy depending upon the frequency of the incident radiation.

As, $hv =h v_0+K . E .$

$\therefore K . E .= hv - hv _{ o }$

Since $h v_0$ is constant, the maximum $K.E.$ is always less than the maximum value of energy $(h v)$ depending upon the frequency of the incident radiation.

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