EM radiation is light. The speed of light is about 3.0 X 10^8 meters per second. 19 us = 19 x 10^-6 seconds
(3.0 X 10^8 m/s) X (19 X 10^-6 s) = 5.7 X 10^3 m or 5700 meters.
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EM radiation is light. The speed of light is about 3.0 X 10^8 meters per second. 19 us = 19 x 10^-6 seconds
(3.0 X 10^8 m/s) X (19 X 10^-6 s) = 5.7 X 10^3 m or 5700 meters.