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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 ) of a second. Its symbol is ?s, 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 ?s) - cycle time for frequency (1 MHz), the inverse unit. This corresponds to radio wavelength 300 m (AM medium wave band), as can be calculated by multiplying 1 ?s by the speed of light (approximately ) to determine the distance travelled.
- 1 microsecond - the length of time of a high-speed, commercial strobe light flash (see air-gap flash).
- 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 kilometer 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 (?s) - 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 (0.1 ms) - cycle time for frequency 10 kHz
- 125 microseconds - sampling interval for telephone audio (8000 samples/s)
- 164 microseconds - half-life of polonium-214
- 240 microseconds - half-life of copernicium-277
- 250 microseconds - cycle time for highest tone in telephone audio (4 kHz)
- 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 of one second).
- The average human finger snap takes 150,000 microseconds (just over 1/7 of one second).
- A camera flash illuminates for 1000 microseconds.
- Standard camera shutter speed opens the shutter for 4000 microseconds or 4 milliseconds.