If a photon (a quanta of light) has enough energy, it can undergo pair production and form an electron and one positron for example. This has clearly been demonstrated in a bubble chamber. a lot of the things that needs to be conserved in this reaction is conserved. However, it is clear that mass is not. One way of explaining it is to say that the conservation of mass and conservation of energy is one and the same conservation law, that is, conservation of mass-energy. The formula [itex]E = mc^2[/itex] is used in this situation.Well, for example, what make E=mc^2 possible? What makes energy so unified with mass. As well as were does the tide turn, when do you know that mass isn't mass and is now energy and what connects this notion? Thats what Im asking, do you believe a "third leg" exists? One that borders energy and mass.
Is there a transition at all?So, what your saying is that what energy and mass have in common is the conservation law, which is true for both cases, and is therefore what unites them? I see... well alright, the conservation law makes it madatory for energy and mass to be conserved, I understand that but what makes it possible, what makes the transition possible? (Moridin: thanks for posting the websites, I found the cern page most enlightening :) )
That is actually Noether's Theorem.Could you explain the last statement in more detail?