Re: Correction
The energy of a photon is
E = h * f
where,
E = energy of a photon
h = Planke's constant
f = frequency
Also the speed of a photon is
c = f * w
where,
c = speed of light
f = frequency
w = wavelength
No big deal... a red-shift would indicate a loss of energy. Same hypothesis, energy lost by spooky collisions of photons, and subsequent decay of blue-shifted minority into particle-antiparticle pairs.