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Concept
Microsecond
Summary
A microsecond is a unit of time in the International System of Units (SI) equal to one millionth (0.000001 or 10−6 or ) of a second. Its symbol is μs, sometimes simplified to us when Unicode is not available.
A microsecond is equal to 1000 nanoseconds or of a millisecond. Because the next SI prefix is 1000 times larger, measurements of 10−5 and 10−4 seconds are typically expressed as tens or hundreds of microseconds.
1 microsecond (1 μs) – cycle time for frequency 1e6hertz (1 MHz), the inverse unit. This corresponds to radio wavelength 300 m (AM medium wave band), as can be calculated by multiplying 1 μs by the speed of light (approximately 3.00e8m/s).
1 microsecond – the length of time of a high-speed, commercial strobe light flash (see air-gap flash).
1 microsecond – protein folding takes place on the order of microseconds.
1.8 microseconds – the amount of time subtracted from the Earth's day as a result of the 2011 Japanese earthquake.
2 microseconds – the lifetime of a muonium particle
2.68 microseconds – the amount of time subtracted from the Earth's day as a result of the 2004 Indian Ocean earthquake.
3.33564095 microseconds – the time taken by light to travel one kilometre in a vacuum
5.4 microseconds – the time taken by light to travel one mile in a vacuum (or radio waves point-to-point in a near vacuum)
8.01 microseconds – the time taken by light to travel one mile in typical single-mode fiber optic cable
10 microseconds (μs) – cycle time for frequency 100 kHz, radio wavelength 3 km
18 microseconds – net amount per year that the length of the day lengthens, largely due to tidal acceleration.
20.8 microseconds – sampling interval for digital audio with 48,000 samples/s
22.7 microseconds – sampling interval for CD audio (44,100 samples/s)
38 microseconds – discrepancy in GPS satellite time per day (compensated by clock speed) due to relativity
50 microseconds – cycle time for highest human-audible tone (20 kHz)
50 microseconds – to read the access latency for a modern solid state drive which holds non-volatile computer data
100 microseconds (0.
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