Re: Fw: communication concepts ??
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I personally think that electro-magnetism is a force, therefore electromagnetic waves = electromagnetic force. and force can travel thru vacumn, thats how our rockets flies to the moon.
Rockets travel though space because for any force there is an equal but opposite force. Thrust from the rocket engine is focused in the opposite direction the rocket needs to go. ?This in turn forces the rocket forward. But the force itself is not propagated though the vacuum.
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