Recent content by newphy

If intelligent life had evolved on some planet 6.8 billion years ago (half the time to the big bang 13.6 bilion years ago) and they had sent the equivalent of the COBE / Planck satellite to map the cosmic background radiation, where in the electromagnetic spectrum would they have seen the...

I am trying to understand the connection between symmetry and conservation. For the electromagnetic force, the conserved quantity is charge, the corresponding symmetry is the phase of the wave and the force carrier is the photon. For the electroweak force, the conserved quantities are the...

I am a newbie to QM. Why can't the Klein Gordon equation be used to describe particles with spin? Thanks