Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited state to the ground state irradiates a photosensitive material. The stopping potential is measured to be 3.57 V. The threshold frequency of the materials is:
As we learnt in
Conservation of energy -
- wherein
Amount of energy radiated when electron jump from n = 2 to n = 1
Then
Threshold frequency =
Option 1)
Incorrect
Option 2)
Incorrect
Option 3)
Correct
Option 4)
Incorrect