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why is light a pure energy in physics


srikarkandukuri467 6th Nov, 2021
Answers (2)

Hello,

I hope you are doing good,

light is not in fact pure energy. It is, however, true that light has no mass. But the fact that light has no mass does not mean that light is pure energy. Light is actually made up of objects called photons. This can be compared to other fundamental quantum objects since they are similar to electrons and neutrinos. But electrons are negatively charged, and photons are not.

Nitin Mereddy 6th Nov, 2021

Light is not pure energy. While it is true that light has no mass, this fact does not imply that light is pure energy. Light is composed of fundamental quantum objects called photons which we list (http://en.wikipedia.org/wiki/Standard_Model) alongside other fundamental quantum objects such as electrons and neutrinos. Each object on this list contains several different properties which determine how the object behaves. Mass and kinetic energy are only two of several properties that a fundamental quantum object can carry. Saying that light is "pure energy" would imply that light only carries the property of energy and no other properties, which is simply not true. A single photon, which is the smallest bit of light possible,

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