If the wavelength of light in an experiment on photoelectric effect is doubled,
(i) the photoelectric emission will not take place
(ii) the photoelectric emission may or may not take place
(iii) the stopping potential will increase
(iv) the stopping potential will decrease

Options

A. (i),(ii)
B. (ii),(iii)
C. (i),(iv)
D. (ii),(iv)

Answer

D

Explanation

It mat be that `(hc)/(2 lambda) gt phi` or `(hc)/(2 lambda) lt phi`
`V_(s)` decreases if wavelength increases