Assertion : Photosensitivity of a metal is high if its work function is small.
Reason : Work function ` = hf_(0) where f_(0)` is the threshold frequency.

The work funtion of metal is 6.6eV .Find its threshold frequency.

(a) The threshold frequency of photoelectric effect supports the particle nature of sunlight. ( b) The specific charge of positive rays is constant. ( c ) Photosensitive of a metal is high of its work function is small. ( d ) The stopping potential is independent of intensity of the incident light.

The threshold wavelength of a metal is 1243 nm its work function will be