Rectifier wrote:
Read it again! I didn't say photons have zero mass; I said
electromagnetic radiation (EMR) has no mass. EMR exhibits both wave and
particle properties. When travelling at the speed of light, it exhibits
wave properties.

When traveling at the speed of light, it exhibits particle
properties. It has been about half a century since experiments
proved that light waves are bent by gravity thus proving that
electromagnetic radiation has mass. That idea was postulated
in 1915. Did you get your degree before then? :-)
--
73, Cecil http://www.w5dxp.com