Question

When a metallic surface is illuminated with radiation of
wavelength ????, the stopping potential is V. If the same surface
is illuminated with radiation of wavelength 2????, the stopping
potential is V/4. The threshold wavelength for the metallic
surface is : [2016]
(a) 4???? (b) 5????
(c)5/2???? (d) 3????

Answer 1

Answer:

I thought c option is correct answer

HOPE IT WILL HELP YOU

Answer 2

this question is of which class ?