>PE = mgh (I know this, because those are my initials)
>
>So when we solve for a photon, which has a mass (m) of zero, the result is no gain in potential energy.
A photon does not have a mass zero. Since it has energy, it must also have mass. If physisists say that it has a
rest mass of zero, this simply means that a photon moves at the speed of light. The "rest mass" of any particle moving at the speed of light can't be different from zero, or else, at the speed of light, it would have an infinite mass.
Like a "regular" particle, a photon has mass, energy, and momentum (mass x velocity), gravitational attraction, among others.
>The point is, if the law is broken at any scale, the advancing of an argument against a theory on the grounds that the law cannot be broken is a flawed criticism.
OK, of course you are right here.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)
