Question

Plot a labelled graph of |V_s| where V_s is stopping potential versus frequency f of the incident radiation. State how will you use this graph to determine the value of Planck's constant?

Answer 1

The graph of stopping potential, |V_s| versus frequency f, of incident radiation is given below:

The value of Plank's constant can be determined, from the above graph as:

h = e, slope of (V_s - f) graph