Middle School

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------------------------------------------------ Light and heat energy travel through space at a speed of:

A. 186,000 feet per second
B. 186,000 miles per second
C. 186,000 miles per minute
D. 1,860 miles per hour

Answer :

Answer: B. 186,00 miles per second.

Explanation:

The speed of light in a vacuum is equal to


1 / sqrt(e0 * u0)


where e0 is the electric permittivity of free space, and u0 is the magnetic permeability of free space. So that's where the speed of light comes from.


But where do the permittivity and permeability come from? Actually, nobody knows. They are seemingly arbitrary universal constants.

Answer:

b.186,000 miles per second

Explanation:

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