How light is electromagnetic wave ?
Before I proceed with the explanation, I would like to clear a few basic concepts: 1. Electromagnetic waves are energy carriers 2. Photons are just ‘packets of energy’ being propagated as electromagnetic wave. Now, Elecromagnetic waves are associated with charge. Any charge in accelerated motion will produce an electromagnetic wave: This is because: 1. A charge is always associated with an electric field 2. A moving charge is a source of magnetic field. So, when a charge is accelerated, it sets up a wave consisting of varying electric and magnetic fields oscillating in mutually perpendicular directions. The two fields sustain each other and result in a continuum of energy. This is the electromagnetic wave. An electromagnetic wave is generated by charges. This doesnt mean it is made up of charges. Okay? When the oscillations of the electric and magnetic fields of the electromagnetic wave are of a particular frequancy, the energy of the wave manifests as visible light. Einstein calls the
