4 Answers
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the speed of electromagnetic radiation in a vacuum is 3×10^8m/s
in 50 us = 50×10^-6 s, this radiation will travel a distance of
3×10^8 x 50×10^-6 = 150×10^2 m = 1.5×10^4 m
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The speed of light in a vacuum = 3 x 10^8 m/s
(3 x 10^8 m/s)(50 x 10^(-6) s) = 15,000 m
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Electromagnetic radiation travels at “roughly” the speed of light, which is about 186,000 miles per second. So you would multiply by the time traveled, in this case, 50 micro-seconds, or .000050 seconds. Comes out to nearly a mile (0.93).
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3×10^8 * 50×10^-6 = 15000 m = 15 km
