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Light Reflection and Refraction
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09/08/2021 12:57 pm
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A communications satellite in orbit sends a parallel beam of signals down to earth. If these signals obey the same laws of reflection as light and are to be focussed onto a small receiving aerial, what should be the best shape of the metal ‘dish’ used to collect them?
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09/08/2021 12:59 pm
Concave metal dish: It will collect the parallel beam of satellite signals at its focus where receiving aerial is fixed.