(iii) All photons of light of a particular frequency  n, or wavelength l, have
the same energy E (=hn = hc/l) and momentum  p (= hn/c= h/l),
whatever the intensity of radiation may be By increasing the intensity
of light of given wavelength, there is only an increase in the number of
photons per second crossing a given area, with each photon having
the same energy Thus, photon energy is independent of intensity of
radiation (iv) Photons are electrically neutral and are not deflected by electric and
magnetic fields