[Dan Evans]

BTW, this point was brought up by a previous poster who was trying to argue that the atmosphere doesn't absorb much light; even though the light he is talking about is non-coherent and I don't even know if that's a valid comparison.

Why would you think that atmospheric absorption would be greater for coherent light?

[ableChair]

Why would you think that atmospheric absorption would be greater for coherent light?

STRAW MAN! I didn't say that. What I said was that I don't know if they are comparable. Read the posts.