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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The Concave metal dish is the best shape to collect the parallel beam of signals that are sent to the earth by the communications satellite in the orbit.
EXPLANATION:
- The parallel beam of signals needs to be focussed onto a small receiving aerial, then the metal dish is the best shape used to collect them.
- This is because of the reason that the metal dish behaves like the concave mirror, which is a converging mirror.
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Answer:Concave mirror
Explanation:
Metal dish should be used as an concave shape which is converging
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