1. What is the function of the dish? Ans: It is to focus the weak signals so that to intensify them. 2. What wave property is suitable to describe the phenomenon happened in the dish? Ans: Reflection. 3. If an antenna is to be placed in front of the dish, where it should be placed to get the strongest signal? Ans: It should be placed at the principle focus of the dish. 4. If the dish diameter is larger, what would happen to the signal received? Ans: The weak signals can be focus more. The signal received is more concentrated and stronger. Are my answers correct? Please give me some comments.