The diagram shows a dish antenna which is used to receive television signals from a satellite. The antenna (signal detector) is fixed in front of the curved dish.; (a) What is the purpose of the dish?; (b) Should it be concave or convex ?; (c) Where should the antenna be positioned to receive the strongest possible signals ?; (d) Explain what change you would expect in the signals if a larger dish was used.
Answers
Answer:
(a) What is the purpose of the dish?
It is used to catch the signals and converge them to the signal detector.
(b) Should it be concave or convex?
It should be concave since it helps in converging the rays.
(c) Where should the antenna be positioned to receive the strongest possible signals?
It should be placed at the focus of the dish in order to collect the converged signals.
(d) Explain what change you would expect in the signals if a larger dish was used.
If a larger dish was used, the aperture of the concave mirror would have been bigger; therefore, the signals received by the antenna would have been stronger.
Answer:
(a) The purpose of the dish is to collect large amount of signals from the satellite.
(b) Concave
(c) At the focus of the dish.
(d) Stronger signal will be received.
Explanation:
I hope it will help you