Question

how can concave mirror be used as radiation collector​

Answer 1

Answer: as concave mirror have a focus

Explanation: as it is a converging lens

Answer 2

hey friend here is your answer

Explanation:

the radiations are coming from long distance therefore they are parallel to concave mirror . now a if a beam of light is parallel to concave mirror it reflect the rays on its focus.

that's why the radiations parallel to concave mirror are reflected on its focus where it get collected.

hope it helps you ❣️