Question

what is the speed of light?

Answer 1

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The speed of light is 299 792 458 m / s.



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Answer 2

Speed of Light

• When travelling in a vacuum, the speed of light is $299792$ kilometres per second.
• When expressed in miles, the speed of light in a vacuum is $186282$ miles per second.
• In a single second, this speed is enough to travel the Earth's diameter more than 7 times.
• It's crucial to remember that light travels in waves.
• Any interaction with matter will slow it down. However, in the Earth's atmosphere, its speed is almost equal to that of a vacuum.