In photoelectric effect, stopping potential for a light of frequency `n_(1)` is `V_(1)`. If light is replaced by another having a frequency `n_(2)` then its stopping potential will be

Options

A. `V_1 - h/e (n_2 -n_1)`
B. `V_1 + h/e (n_2 + n_1)`
C. `V_1 + h/e (n_2 - 2n_1)`
D. `V_1 + h/e (n_2 - n_1)`

Answer

D

Explanation

`W_0 = hv_1 - eV_1`
` = hv_2 - eV_2`
`eV_2 = h (v_2 - v_1) + eV_1`
`eV_2 = (h (n_2 - n_1 ) )/(e ) + V_1`