4 ms·
Think of a sunset just before the sun appears to fall below the horizon as the length of the shadows approaches infinity. Not only shadows can move faster than
by rekado 3y ago
Think of a sunset just before the sun appears to fall below the horizon as the length of the shadows approaches infinity.
Not only shadows can move faster than light. Any projection can. Take a laser pointer and aim for the moon, then flick your wrist back and forth. The point appears to move faster than light across the surface of the moon. The photons still travel in a straight line, at the speed of light; but you are sending new photons in a different direction. There really is no single photon actually moving across the surface of the moon; it is merely an image.
- lupire 3y agoIt's not that there is no photon moving; it's that the image isn't any object, it's a series of different objects being illuminated in order. Even when an real object is moving, there isn't any single photon moving along with it that enables you to see it move.
- rekado 3y agoYes, this is what I meant. There is no single photon (or any other single object) moving across the surface of the moon. No individual thing is moving faster than the speed of light in this scenario.