see, now dont you feel much better.
the macro molecule vibration is a large part of the statistic of temperature but there is a much larger energy involved in binding atom together you are ignoring and generally we only see that energy in a nuclear blast.
we were not discussing what binds atoms together now were we?
we were discussing mass , and how mass can not be finite.
we have shown that kinetic energy can be lost!
the fact that the atom absorbs the photon
and the atom also slows proves that kinetic energy was lost , not transfered , not converted , lost.
if the kinetic energy of the photon and the atom would not have been lost , it would be at that point that we should get worried about violating laws.
but everything worked just as physics expected it to.
at some point in time , something gave that photon its kinetic energy.
like when the sun is used in a solar sail.
the only difference is that the solar sail does not vibrate at the same frequency / wavelength as the photons , so they bump the sail and bounce off , giving momentum to the sail.
the motion of the mass of the sail is its kinetic energy.
