Richard Clark wrote:
You misspelled plonk, but baby makes three. That makes the last one
who can't do the math.

The photon mass math is trivial.

E= mc^2 = hf

m = hf/c^2 = h/(c)lamda

If I remember correctly, a photon cannot travel slower
than the speed of light.
--
73, Cecil http://www.w5dxp.com