what is light ? and how it travels through the any medium?
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HOW DOES LIGHT TRAVEL? Light travels as a wave. But unlike sound waves or water waves, it does not need any matter or material to carry its energy along. This means that light can travel through a vacuum—a completely airless space.
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Light is an electromagnetic wave and a form of energy which enables us to see the objects from which it comes or from which it is reflected. It travels in straight lines.
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