[quote]To better clarify what I mean by energy dissipation, since you might think I'm meaning momentum, when I'm not. A laser is a heated beam of light, and the heat is where it gets the majority (if not entirety) of its destructive power, no? Heat dissipates in space, however. What better example to use of this than the moon orbiting the Earth, which has no atmosphere to stop the heat of the sun, and of course the sun, which is immensely stupidly hot.[/quote]

What are you even talking about? This makes literally zero sense. And your math is awful. You should calculate how much energy is released by the moon's shadow on the sun and compare that to what the moon recieves.