4 ms·
Well, for truly unbounded length you need to keep the source on for infinite time of course. But light beams do get very long for very modest work, and properl
by SiempreViernes 8y ago
Well, for truly unbounded length you need to keep the source on for infinite time of course.
But light beams do get very long for very modest work, and properly focused they can propagate very long distances indeed.
- SideburnsOfDoom 8y agoSo, to be clear here - is the answer yes or no? Are we talking about beam width - i.e. unbounded in a direction at right angles to the direction of travel?