Light is a form of energy which is propagated as electromagnetic waves. In the spectrum of electromagnetic waves it lies between ultra-violet and infra-red region and has wavelength between 3900 Å to 7800 A.

Electromagnetic waves are transverse, hence light is transverse wave.

All the electromagnetic waves including light do not require medium to propagate. Wave nature of light explains rectilinear propagation,

reflection, refraction, interference, diffraction and


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