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One millionth of a second
This animation illustrates the generation of the debris and ejecta clouds after a spherical aluminum projectile impacts a thin aluminum plate at approximately 7 km/s. The frame interval is about 1 microsecond.
A microsecond is an SI unit of time equal to one millionth (0.000001 or 10-6 or 1⁄1,000,000) of a second. Its symbol is ?s, sometimes simplified to us when Unicode is not available.
A microsecond is equal to 1000 nanoseconds or 1⁄1,000 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 ?s) - cycle time for frequency (1 MHz), the inverse unit. This corresponds to radio wavelength 300m (AM medium wave band), as can be calculated by multiplying 1 ?s by the speed of light (approximately ).
250 microseconds - cycle time for highest tone in telephone audio (4 kHz)
260 to 480 microseconds - return trip ICMP ping time, including operating system kernel TCP/IP processing and answer time, between two gigabit ethernet devices connected to the same local area network switch fabric.
277.8 microseconds - a fourth (a 60th of a 60th of a second), used in astronomical calculations by al-Biruni and Roger Bacon in 1000 and 1267 AD, respectively.
489.67 microseconds - time for light at a 1550 nm frequency to travel 100 km in a singlemode fiber optic cable (where speed of light is approximately 200 million meters per second due to its index of refraction).
The average human eye blink takes 350,000 microseconds (just over 1⁄3 second).
The average human finger snap takes 150,000 microseconds (just over 1⁄7 second).