Grégoire Locqueville on Nostr: Just so we're clear: you're suggesting that the bacterium in my eye shoot a tiny ...

Just so we're clear: you're suggesting that the bacterium in my eye shoot a tiny laser towards my nose, on which a tiny mirror will have been placed, allowing the laser light to bounce on it and get back to my eye; and that the bacterium measure the time (on its clock) between the moment it shoots the laser and the moment it gets its light back. Right?

Now you say my nose is "receding", and my eye is "running towards" it — but what frame of reference are we talking about now? I thought we were talking about my local frame of reference, in which neither my eye nor my nose are moving! If we're talking a distant observer's point of view, we've already established they do indeed think I am flattened!

John Carlos Baez (npub1nf4…nqe4) Greg Egan (npub12cu…d38p)