Q165. The figure shows a plot of photo current versus anode potential for a photosensitive surface f

Q165. The figure shows a plot of photo current versus anode potential for a photosensitive surface for three different radiations. Which one of the following is a correct statement? (1) Curves (a) and (b) represent incident radiations of different frequency and different intensities (2) Curves (b) and (c) represent incident radiations of different frequencies and different intensities (3) Curves (b) and (c) represent incident radiations of same frequency having same intensity (4) Curves (a) and (b) represent incident radiations of same frequencies and different intensities