Question

what is the speed of light
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Answer 1

Step-by-step explanation:

The speed of light is 3×10⁸m/s.

Light slows down while passing from air to water or glass and speeds while passing from water or glass to air .

Answer 2

Answer:The distance light can travel in a unit of time through a given substance. Light travels through a vacuum at about 186,000 miles, or 300,000 kilometers, per second. (See E = mc2, electromagnetic waves, relativity, and twin paradox.)