2 ms·
See: Bessel's correction. https://en.m.wikipedia.org/wiki/Bessel%27s_correction https://en.m.wikipedia.org/wiki/Bessel%27s_correction
by aisofteng 9y ago
See: Bessel's correction.
https://en.m.wikipedia.org/wiki/Bessel%27s_correction https://en.m.wikipedia.org/wiki/Bessel%27s_correction