Thursday 24 July 2014

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WHAT ARE THE PROPERTIES OF PHOTON

Einstein explain photoelectric effect by  assuming that electromagnetic radiation travels through space in discrete quanta called photons . Thus photon is a quantum of electromagnetic radiation which always travels along straight paths with velocity equal to that of light and zero rest mass .

Properties of photon  

                         The energy of a photon of frequency v is hv .

                        A photon behave like a particle of rest mass equal to zero .

                         It possess not only a definite energy hv but also a definite momentum equal to p=  mc =mcc/c =E /c .

                       Photons are electrically neutral and so are not affected by electric and magnetic field .

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