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Just Chat! / Re: Does an infinitely long iron bar have two tangible endpoints? (Have mercy.)
« on: 12/03/2024 22:22:04 »
Before lasers came on the scene, this was known as the scissor paradox: how fast does the shadow move as you cut a light beam with a pair of scissors?
But as with all paradoxes, it isn't paradoxical, just badly stated. The shadow (or laser spot) doesn't transmit information in a direction perpendicular to the light beam, and any information transmitted along the beam travels at c.
But as with all paradoxes, it isn't paradoxical, just badly stated. The shadow (or laser spot) doesn't transmit information in a direction perpendicular to the light beam, and any information transmitted along the beam travels at c.
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