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Please help what is the definition ligthspeed
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Please help what is the definition ligthspeed

User James Nelli
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Light speed is the speed at which light can travel in a "vacuum" (space for example).

The speed of light is constant and is exactly: 299,792,458 meters per second

ONLY IN A VACUUM!!

The speed of light changes when it goes through different mediums (such as from space to Earth, light travels slower in Earth).

Good luck!

User Aleksk
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