Q. 195.0( 1 Vote )

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 focused onto a small receiving aerial, what should be the best shape of the metal 'dish' used to collect them?

Answer :

Concave metal dish: It will collect the parallel beam of satellite signals at its focus where receiving aerial is fixed.

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