How electromagnetic radiation behaves as particle as well as wave?

Electromagnetic radiation such as light has dual nature of radiation. For example light behaves both as a wave and a particle. As a particle it is made up of packets of energy called photons which have a certain fixed amount of energy and do not have any mass. The energy of a photon depends on its wavelength. In the early 1900s scientists considered electromagnetic radiation to be made up of waves and with the invention of photoelectric effect light was believed to be made up of packets of energy called photons by Einstein.

Einsten won his noble prize in 1921 for his concept ‘wave-particle’ duality of light.

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Vasantha Sivaraj,

askIITians faculty.