The fig. shows the variation of photon current with anode potential for a photo-sensitive surface for three different radiation. Let `I_(a), I_(b) and I_(c)` be the intensities and `f_(a), f_(b) and f_(c)` be the frequency for the curves a,b and c respectively.

Options

A. `f_(a) = f_(b)`
B. `I_(a) lt I_(b)`
C. `f_(c) lt f_(b)`
D. `I_(c) gt I_(b)`

Answer

C

Explanation

Here `I_(B) = I_(C) gt I_(a)` and `f_(c) gt f_(a) = f_(b)`