3 ms·
One example is a laser guide star: https://en.m.wikipedia.org/wiki/Laser_guide_star https://en.m.wikipedia.org/wiki/Laser_guide_star
by bronson 6y ago
One example is a laser guide star: https://en.m.wikipedia.org/wiki/Laser_guide_star https://en.m.wikipedia.org/wiki/Laser_guide_star