Write the basic features of photon pictures of e.m. radiation on which

1.	Write the basic features of photon pictures of e.m. radiation on which Einstein’s photoelectric equation is based.
Answer» Photon picture of em radiations : (i). In interaction of radiation with matter, radiation behaves as if it is made of particles like photons. (ii). Each photon has energy E(= h) and momentum p (=\(\frac{h}{\lambda}\)) (iii). Irrespective of the intensity of radiation, all the photons of a particular frequency and wavelength have the same energy and same momentum. (iv). Photon energy is independent of the intensity of radiations. (v). Photons emitted from a source of radiations travel with the speed of light. (vi). The rest mass of a photon is zero. (vii). Photons are electrically neutral (viii). In a photon particle collision, the energy and momentum are conserved. However, Number of photons may not be conserved, photon may be absorbed or new photon may be created.

Write the basic features of photon pictures of e.m. radiation on which Einstein’s photoelectric equation is based.

Answer»

Photon picture of em radiations :

(i). In interaction of radiation with matter, radiation behaves as if it is made of particles like photons.

(ii). Each photon has energy E(= h) and momentum p (=\(\frac{h}{\lambda}\))

(iii). Irrespective of the intensity of radiation, all the photons of a particular frequency and wavelength have the same energy and same momentum.

(iv). Photon energy is independent of the intensity of radiations.

(v). Photons emitted from a source of radiations travel with the speed of light.

(vi). The rest mass of a photon is zero.

(vii). Photons are electrically neutral

(viii). In a photon particle collision, the energy and momentum are conserved.

However,

Number of photons may not be conserved, photon may be absorbed or new photon may be created.

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