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One thousandth of a second
A millisecond (from
milli- and
second ; symbol: ms ) is a unit of
time in the
International System of Units equal to one thousandth (0.001 or 10−3 or 1 /1000 ) of a
second
[1]
[2] and to 1000
microseconds .
A unit of 10 milliseconds may be called a centisecond , and one of 100 milliseconds a decisecond , but these names are rarely used.
[3]
To help compare
orders of magnitude of different
times , this page lists times between 10−3 seconds and 100 seconds (1
milli second and one second). See also
times of other orders of magnitude .
Horizontal logarithmic scale marked with units of time
Examples
The
Apollo Guidance Computer used metric units internally, with centiseconds used for time calculation and measurement.
[4]
1 millisecond (1 ms) –
cycle time for frequency 1
kHz ; duration of light for typical photo
flash strobe; time taken for
sound wave to travel about 34 cm; repetition interval of
GPS C/A PN code
1 millisecond - time taken for light to travel 204.19 km in a single mode fiber optic cable for a wavelength of 1550nm (frequency: 193 THz).
1.000692286 milliseconds – time taken for
light to travel 300 km in a vacuum
1 to 5 milliseconds – typical response time in LCD computer monitors, especially high-end displays
2 milliseconds –
Shift time for a modern
Formula One car using a seamless-shift
semi-automatic
sequential transmission
[5]
2.27 milliseconds – cycle time for
pitch A440 , the most commonly used pitch for tuning musical instruments
3 milliseconds – a
housefly 's wing flap. Also the normative
speed of sound (an issue in
track and field )
3.3 milliseconds – normal delay time between initiation and detonation of a
C4 explosive charge
4 milliseconds – typical average
seek time for a 10,000 rpm
hard disk
5 milliseconds – a
honey bee 's wing flap
5 milliseconds to 80 milliseconds – a
hummingbird 's wing flap
8 milliseconds – 1/125 of a second, a standard
camera
shutter speed (125); fastest shifting time of a
car's mechanical transmission
10 milliseconds (10 ms) – a
jiffy , cycle time for frequency
100 Hz
10.378 milliseconds – rotation period of pulsar B1639+36A
15.625 milliseconds – a
two hundred fifty-sixth note at 60
BPM
16.67 milliseconds (1/60 second) – a
third , cycle time for
American 60 Hz AC
electricity (mains grid)
16.68 milliseconds (1/59.94 second) – the amount of time one
field lasts in 29.97 fps
interlaced video (commonly erroneously referred to as 30 fps)
20 milliseconds – cycle time for
European 50 Hz AC electricity
31.25 milliseconds – a
hundred twenty-eighth note at 60 BPM
33.367 milliseconds – the amount of time one frame lasts in 29.97 fps video (most common for
NTSC -legacy formats)
41.667 milliseconds – the amount of time one frame lasts in 24 fps video (most common
cinematic frame rate)
41.708 milliseconds – the amount of time one frame lasts in 23.976 fps video (cinematic frame rate for NTSC-legacy formats)
50 milliseconds –
the time interval between gear changes on a
Lamborghini Aventador ; with a 7-speed single-clutch
automated manual transmission
50 milliseconds – cycle time for the lowest
audible tone , 20 Hz
60 milliseconds – cycle time for European 16.7 Hz AC
electrified
railroad
power grid
60 milliseconds – the time interval between gear changes on a
Ferrari 458 Spider ; with a 7-speed
dual-clutch automatic transmission
62.5 milliseconds – a
sixty-fourth note at 60 BPM
5 to 80 milliseconds – typical
latency for a
broadband internet connection (important for playing
online games )
100 milliseconds – the time interval between gear changes on a
Ferrari FXX ; with a 6-speed single-clutch automated manual transmission
125 milliseconds – a
thirty-second note at 60 BPM
134 milliseconds – time taken by
light to travel around the
Earth 's
equator
150 milliseconds – recommended maximum time delay for
telephone service
100–400 milliseconds – the time for the
human eye to
blink
[6]
185 milliseconds – the duration of a full rotation of the main rotor on Bell 205, 212, and 412
helicopters (normal rotor speed is 324 RPM)
200 milliseconds – the time it takes the human brain to recognize emotion in
facial expressions
250 milliseconds – a
sixteenth note at 60 BPM
400 milliseconds – time in which the fastest
baseball
pitches reach the strike zone
430 to 500 milliseconds – common modern dance music tempos (120–140
BPM )
495 milliseconds – an approximate average of the round trip time for communications via
geosynchronous satellites
500 milliseconds – an
eighth note at 60 BPM
770 milliseconds – revolution period of a
78 rpm record
860 milliseconds – average human resting heart cycle time
1000 milliseconds – one
second ; the period of a 1
Hz
oscillator
86,400,000 (24 × 60 × 60 × 1000) milliseconds – one day
604,800,000 (24 × 60 × 60 × 1000 × 7) milliseconds – one week
31,556,925,974.7 (86,400,000 × approximately 365.242) milliseconds – one year
See also
References
External links
Look up
millisecond in Wiktionary, the free dictionary.
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