3 ms·
In a vacuum. See Cherenkov radiation[0]. [0] https://en.wikipedia.org/wiki/Cherenkov_radiation https://en.wikipedia.org/wiki/Cherenkov_radiation
by RJIb8RBYxzAMX9u 6y ago
In a vacuum. See Cherenkov radiation[0].
[0] https://en.wikipedia.org/wiki/Cherenkov_radiation https://en.wikipedia.org/wiki/Cherenkov_radiation