Draw grph between the stopping potential for a given photosensitive surface and the frequency of incident radiation? What does the slope of the graph represent?
Graph between stopping potential and the frequency of the incident radiation for photosensitive material :
From the graph, we note:
(i) For a given photosensitive material, the stopping potential varies linearly with the frequency of the incident radiation.
(ii) For a given photosensitive material, there is a certain minimum cut-off frequency ν0 (called threshold frequency), for which the stopping potential is zero.
Slope of the graph = h/e.