Many films and television programs set in the future show spaceships travelling between planets and galaxies in extremely short periods of time. You will often hear characters in these productions saying that they are travelling faster than the speed of light. But what do they actually mean?When light is emitted from a lamp, a torch or the sun, it travels very quickly. In fact, light travels at the amazing speed of 300,000 km per second!!!
8 minute
30 seconds
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light reaching to Earth
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