A photon of `300 nm` is absorbed by a gas which then re-emits photon .One  re-emited photon
Channel: Doubtnut
Date: 2020-07-26

A photon of `300 nm` is absorbed by a gas which then re-emits photon .One  re-emited photon has a wavelength  of `400 nm` .Calculate  the energy of the other photon  re-emitted not