Quote:
Originally Posted by Gravdigr
Radar is a radio wave, correct? RAdio Detection And Ranging? How is it I can receive a radio station from Nashville? That is beyond line of sight. Is it that the returning signal doesn't have the same properties as the outgoing?
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If you only care about receiving a transmission, you don't care what route it took, but if you're measuring distance by how much time it traveled, you need the direct line there and back.