- #1
Zman
- 96
- 0
When a photon goes say from air to water, it slows down according to;
n=c/v
where n is refractive index of water
c is velocity of light in air
v is velocity of light in water
It is stated that the frequency of the photon doesn't change when the photon enters the water. Only the wavelength changes.
I cannot find a proof for this. Does one exist?
Or is it just based on the conservation of energy E=hf ?
Is it that the frequency can't change so the wavelength must change?
n=c/v
where n is refractive index of water
c is velocity of light in air
v is velocity of light in water
It is stated that the frequency of the photon doesn't change when the photon enters the water. Only the wavelength changes.
I cannot find a proof for this. Does one exist?
Or is it just based on the conservation of energy E=hf ?
Is it that the frequency can't change so the wavelength must change?