Dual Nature of Radiation and Matter

Question: When a point source of light is at a distance of one metre from a photo cell, the cut off voltage is found to be V. If the same source is placed at 2 m distance from photo cell, the cut off voltage will be

1) V

2) V/2

3) V/4

4) $V/\sqrt 2 $

Solution:

Explanation: No Explanation

Photon and Photoelectric Effect

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