speed of light
The "speed of light" is a fundamental constant in physics, crucial to understanding the nature of the universe and the limits of information and matter travel.
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Definition
C1Physics
(technical, scientific)The maximum speed at which light and all electromagnetic waves travel in a vacuum, approximately 299,792 kilometers per second (186,282 miles per second).
Example
- The speed of light is a critical factor in Einstein's theory of relativity.
- Nothing can travel faster than the speed of light in a vacuum.
C1Physics
(technical, scientific)A fundamental constant, denoted by 'c,' representing the upper limit for the speed at which information, energy, and matter can travel in the universe.
Example
- The speed of light sets the ultimate speed limit for the universe.
B2Colloquial
(figurative, informal)A very rapid speed.
Example
- She finished her homework at the speed of light.
Similar
Terms that have similar or relatively close meanings to "speed of light":
light conelight yearlight wavewhite lighthigh speedat speedwarp speedtop speed