Question

- When a metallic surface is illuminated with radiation of
wavelength w, the stopping potential is V. If the same surface
is illuminated with radiation of wavelength 2w, the stopping
potential is V/4. The threshold wavelength for the metallic
surface is-
(1) 4w
(2) 5w
(3) 5/2w
(4) 3w​

Answer 1

Answer:

Hey Buddy here's ur answer

it's 3 lamda not 3 w.