A millisecond (sometimes shortened to 'ms') is one thousandth of a second. This page lists times between 10−3 seconds and 10−2 seconds (1 millisecond to 10 milliseconds).
One millisecond contains 1000 microseconds. There are 1000 milliseconds in one second.
1 millisecond – the time it takes for a normal flash in a camera to finish.
1 millisecond – time taken for sound to travel 34 cm
1.000692286 milliseconds – time taken for light to travel 300km in a vacuum
The basic interval, in time manners, in most of the programming languages is 1 millisecond . e.g. the command delay() in C++. Others use second interval.