Question

Summarise the photon picture of electromagnetic radiation.

Answer 1

The Einstein picture of the photon mass less, constant light is visible light the only type of electromagnetic radiation.

Answer 2

Answer~

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☆ In the interaction of radiation with matter, radiation behaves as if it is made up of particles called photons.

☆ Each photon has energy (hv) and momentum (hv/c) and a speed c.

☆ Photons are electrically neutral and not deflected by electric and magnetic fields.

☆ All the photons of a light of a particular frequency (v) or wavelength (L) have same energy and momentum irrespective of whatever the intensity of radiation may be.

☆ In a photon particle collision the total energy and total momentum is conserved.

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