"Shimrod, no honest scientist would begin to give you definition with an ironclad guarantee for light, or any other part of the electromagnetic spectrum. Truth is, they really don't know what it is." Slag

I agree with that ... and your point is? The fact is, though, radio waves have enough of a physical reality to allow my radio to pick up Radio 4 (UK radio station) broadcasts in the morning.

I can have lots of 'deep thoughts' about life after death too. Those thoughts don't tell me what's going to happen though. I don't know and, 'deep thoughts' notwithstanding, neither do you!