Thread: Define Physical
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Jan9-05, 03:30 PM
P: 613
Quote Quote by Les Sleeth
Nope. We can experience matter. You can't experience energy directly, only its effects on things. What determines validity in science is that experiential component. Matter is not merely a conceptual contrivance as math is.
You cannot experience matter directly either, only its effects on things.

I meant if matter had never existed. The photon has been radiated by matter.
Perhaps not. Aren't there photons which have been around since the big bang without ever being matter?