A photon of wavelength 3310Å falls on a photocathode and an electron
Channel: Doubtnut
Date: 02/08/2020

A photon of wavelength 3310Å falls on a photocathode and an electron of energy `3xx10^(-19)J` is ejected. If the wavelength of the incident photon is changed to 5000Å, the energy of the ejected electron is `9.72xx10^(-20)J`. Calculate the value of Planck's constant and threhold wavelength of the photon.