How the light can travel much speed than compared to sound in vaccum?
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Light waves travel much faster than sound waves. Light waves do not need a medium in which to travel but sound waves do. Explain that unlike sound, light waves travel fastest through a vacuum and air, and slower through other materials such as glass or water.
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sound can't travel In vaccum because it is a mechanical wave while the speed of light in vacumm is 300000000km/h.
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