No, Jimbo is utterly certain that the speed of light was measured JUST ONCE in a 20 meter vacuum tube or whatever.<quoted text>
Light ** IS ** EM radiation. The ONLY difference is the wave length. They all travel at the same speed.
There is TONS of research on the speed of electromagnetic radiation. All our satellites functioning and information is dependent on this speed being a constant of just under 300 k/s.
His utter ignorance of the history and methods of science, along with any basic scientific knowledge, is abysmal. Shall we let him in on the little secret that the speed of light has been measured thousands of times in hundreds of ways? Or just enjoy watching him hoist himself on his own petard again, and again, and again?