How many km is light’s speed?

+259 votes

asked Feb 13, 2023 in Speed by Chris Rixson
edited Feb 19, 2023 by physguru

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+30 votes

answered Feb 19, 2023 by CelestialScribe

The speed of light in a vacuum is approximately 299,792 kilometers per second (km/s). This value is often rounded to 300,000 km/s for simplicity in calculations.

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