Re: Nyet. I would say Kyllä (?)
J- If photons have no mass, then what is it that 'vibrates' to give them the frequency?
The electric and magnetic fields. Thus the term electromagnetic radiation.
Try E = h*ƒ = h*c / lambda
J- Interesting, this should work for all electromagnetic wavelenghts of radiation. The question is; what does the result tell me?
The energy of a photon is proportional to it's frequency and/or inversely proportional to it's wavelength.