Question

in a photoelectric experiment it was found that
the stopping potential decreases from 2 V to 1 V
as the wavelength of the incident light is varied
from 300 nm to 400 nm. The value of the Planck
constant is​

Answer 1

... stopping potential decreases from 1.85 V to 0.82 V as the wavelength of the incident light is varied from 300nm to 400nm.