The electric field of light wave is given as vector E = 10-3 cos (2πx/5 x 10-7 -2π x 6 x 1014 t) x N/C. This light falls on a metal plate of work function 2eV. The stopping potential of the photo-electrons is : Given E (in eV) = 12375/ λ(in Å).
(1) 0.72 V (2) 2.0 V (3) 0.48 V (4) 2.48 V
