light ohas dual nature one is wave and another is partical.. how it can be possible to have dual nature ? i imagine a partical naming vion (vaibhav's ion) partical. i am writing thesis on this .... but i want the answer of the above question.
Because the physical pictures of light as particles or waves are mathematical descriptions (or analogues, if you will) of a natural phenomenon and it can be proven that the wave description (usually the analytic one) and the particle description (usually the algebraic one) are mathematically equivalent.
However, one has to distinguish between the physical-mathematical description of something and the real thing (this is already quite a philosophical question). - It is the same idea as if you would say a picture of an elephant is a real elephant, it is not. In other words, light is neither a wave or made up of particles (most probably) in reality but it can be very well described by those two things.
Because the physical pictures of light as particles or waves are mathematical descriptions (or analogues, if you will) of a natural phenomenon and it can be proven that the wave description (usually the analytic one) and the particle description (usually the algebraic one) are mathematically equivalent.
However, one has to distinguish between the physical-mathematical description of something and the real thing (this is already quite a philosophical question). - It is the same idea as if you would say a picture of an elephant is a real elephant, it is not. In other words, light is neither a wave or made up of particles (most probably) in reality but it can be very well described by those two things.
sir, thanks for the good explanation . the photon is partical of light but its rest mass is zero , how it is possible to be a partical having rest mass zero ... and the wave is eletromagnatic behaviour but light wave don't contain any electric or magnatic behaviour.. so light is not em wave and a partical by the theory but formultly it is proved that is em wave and has partical nature too. something is confusing .. i think there is another partical or a wave which can explain the behaviour of light!
Of course light is influenced by electric and/or magnetic fields: Just google for Faraday effect, Pockels effect, Kerr effect, Voigt effect or Cotton-Mutton effect.
There is no problm for a particle in having null mass at rest. Accordin special relativity, only particles with null mass can reach the speed of ligh.
I think that a photon moving in a waveguide behave as it has a mass, because its velocity is
thank you sirs, i got my answer , i want to know something and i got it from both the answers .
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