Question

Plot a graph showing the variation of stopping potential with the frequency of incident radiation for two different photosensitive materials having work functions W₁ and W₂ (W₁ >W2 ). On what factors does the (i) slope and (ii) intercept of the lines depend?

Answer 1

The graph of stopping potential V_s and frequency (v) for two metals 1 and 2 is shown in fig. 

(i) Slope of graph tan θ = h/e and depends on h and e. 

(ii) Intersect of lines depend on the work function.