Quote:
Originally Posted by JrKASperov
Sorry but you cannot observe those (given they exist). You can observe an effect of a property of the so-called electron on an instrument. You don't observe the force on an object, you see only the rock, moving(accelerating).
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What would you call observing, then? You can't really directly observe the rock or the instrument either. Only the light reflecting (and issuing) from them. Or more accurately, the reactions the light causes in your eyes. It is entirely possible to observe things indirectly, from the effects they have on other things.
Quote:
Originally Posted by JrKASperov
(I will add that according to General Relativity, gravity as a force does not exist!!)
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To tell the truth, I had forgotten all about that. Embarassing. Eh, Newton's laws are accurate enough for rock throwing.