The figure shows the variation of photocurrent with anode potential for a photo-sensitive surface for three different radiations. Let $I_a, I_b$ and $I_c$ be the intensities and $f_a, f_b$ and $f_c$ be the frequencies for the curves a, b and c respectively |
$f_a=f_b$ and $I_a≠I_b$ $f_a=f_c$ and $I_a=I_c$ $f_a=f_b$ and $I_a=I_b$ $f_a=f_c$ and $I_a≠I_c$ |
$f_a=f_b$ and $I_a≠I_b$ |
The stopping potential for curves a and b is same. $∴f_a=f_b$ Also saturation current is proportional to intensity $∴I_a<I_b$ |