Speed of Light
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Speed of light in vacuum
About Speed of Light (c)
Exactly 299,792,458 meters per second in vacuum, the speed of light is a fundamental physical constant and the ultimate speed limit in the universe. Fiber optic signals travel at about 0.67c through glass, and GPS satellites must account for relativistic time dilation caused by their orbital speed relative to Earth's surface.
- Category
- Speed
- Symbol
- c
- Also known as
- c light speed
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Frequently Asked Questions
What is a Speed of Light (c)?
Speed of light in vacuum
How many Meter per Second (m/s) are in one Speed of Light (c)?
One Speed of Light (c) equals 299,792,458 Meter per Second (m/s).
How many Kilometer per Hour (km/h) are in one Speed of Light (c)?
One Speed of Light (c) equals 1,079,252,848.8 Kilometer per Hour (km/h).
How many Mile per Hour (mph) are in one Speed of Light (c)?
One Speed of Light (c) equals 670,616,629.38 Mile per Hour (mph).
How do I convert Speed of Light to Meter per Second?
To convert Speed of Light to Meter per Second, multiply the value by 299,792,458 (1 c = 299,792,458 m/s).