The varying speed of light cosmology, mostly proposed by Jean Pierre Petit, has no substantial evidence for it as is regarded as merely a concept though.However….It would require a rewrite of much of modern physics, to replace the current system which dependent on the constant c. which has been functioning quite well for quite some time now 🙂
A photon – as you know – is an electromagnetic (EM) wave.Its energy is described by e = h. n in a quantum of energy. All EM waves travel in the vacuum with the speed of light. A photon is a form of energy and
results from transformations of another forms of energy.
When the photon appears it behaves like all EM waves.It does´t need to be accelerated. All bodies emit EM waves,even a peace of ice. The question concerns more on the frequency. If you see the light – visible light – it covers a range of wave length between 400 and 700 nanometers.
frequency. If you see the light – visible light – it covers a range of wave length between 400 and 700 nanometers.
Waves do not need to be accelerated or decellerated. Particles
do, but we are talking about wave-photons, aren´t we ??And – besides of that – photons are generally regarded as particles with zero mass and no electric charge…
As physics stands currently, photons do not accelerate or decelerate no matter what wiki says.:) although they possibly and that's a really very big possibly in the future.