A metal surface is irradiated with light of fixed intensity and frequency ν1 (ν1>ν0). The resulting photocurrent is measured at zero applied potential. The frequency is then changed to 2ν1 while the intensity is kept the same, still satisfying 2ν1>ν0. Which of the following best describes the changes observed?
a) Saturation photocurrent increases; stopping potential decreases
b) Both saturation photocurrent and stopping potential decrease
c) Saturation photocurrent remains the same; stopping potential decreases
d) Both saturation photocurrent and stopping potential remain the same