A microsecond is one millionth of a second. It is written as one times ten to the power of minus six. For ease of reference, when a human blinks, the blink is approximately three hundred and fifty thousand microseconds long.
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(1 centimeter/microsecond) x (1 inch/2.54 cm) x (1 million microsecond / second) = 393,701 inch/second Multiply ( centimeters/microsecond ) by 393,701 to get ( inches/second ).
microsecond is smaller than millisecond
A microsecond is faster by a factor of 1000. It takes 1000 microseconds to make 1 millisecond, and it takes 1000 milliseconds to make 1 second.
1 microsecond = 1/1000000 sec 1000000 microseconds = (1/1000000) x 1000000 = 1 sec
Since a microsecond is a millionth of a second, just divide the distance light travels in one second, by a million.