Ali and Steve, Australia asked:
Is there an antimatter equivalent to light?
Dave - In some sense it does. There is an antimatter equivalent to a photon. Itís not an antiphoton. If you have two photons you know are in exactly the opposite phase they can cancel each other out. As far as we know the photon is its own antiparticle.
Ali & Steve asked the Naked Scientists: Could there be an antimatter equivalent to light it makes sense that the positron would set up an electric field/magnetic field as it moved from one level of excitement to another just as an electron does but the radiation would have it's poles reversed? It should also annihilate normal light? Steve Thompson Lankeys Creek Australia What do you think? Aris, Wed, 17th Dec 2008
yes the antimatter equivalent of light is light a photon is its own antiparticle (this is not the only case of this in quantum mecanics)it is quite possible for one photon to cancel out another. you see this effectively where you get destructive interference.
Dark energy, if it exists, would be the antimatter equivalent to light. Photons are regarded as their own anti-particles but this only applies to their phase, and two anti-phase photons will not annihilate each other (the product of which would be photons), but will only cancel each other at the point of collision. The photons will carry on afterwards, as before the collision, with no loss of energy.
<<it makes sense that the positron would set up an electric field/magnetic field as it moved from one level of excitement to another just as an electron does but the radiation would have it's poles reversed?
DrB - that's not an assertion of any authority. Heh - any assertion that invokes Dark Energy is speculation but some scientists believe that DE may effectively be negative energy.