...
Not sure about this: after all, sound waves are pressure, and light waves are electro-magnetic. So the behaviour of one won't tell us about the behaviour of the other. Moreover, even if light could "echo" in the way you suggest, the signal would diminish in a tiny amount of time - imagine sitting in a dark room with a torch when you switch it off: the light doesn't fade as it bounces about the room. It's just too quick.

You're right, though, to suppose that there is a straightforward explanation for all this stuff - even if it's one on which we never stumble. "I don't understand what I saw therefore it was a ghost" boils down to "I don't understand what I saw therefore I do" - which is, clearly, incoherent.

EDIT: I guess Dr K6 and Dr Forgot her Password - and maybe Dr Crow - are your people here. They're, like, proper scientists.
( Enzyme is powered by sunlight, Thu 3 Jul 2008, 12:40, Reply)