Q : 11.7 (a) A sodium lamp radiates energy uniformly in all directions. The lamp is located at the centre of a large sphere that absorbs all the sodium light which is incident on it. The wavelength of the sodium light is . What is the energy per photon associated with the sodium light?
The energy of a photon is given by
where h is the Planks constant, c is the speed of the light and lambda is the wavelength