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Light is able to travel through vacuum
Ans:
In classical physics electromagnetic radiation (light) is the only kind of wave that doesn't need a medium. For sound rays in air the air is the medium. It is the air that is waving. In the condition of light it is the electric and magnetic fields that do the waving and they are the light itself.
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The distance at any time because of any value of pulse meeting concurrently at a position in a medium is the vector addition of the individual distances due every one of the ray at
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