Answer:
16 times
Explanation:
Generally, the light-gathering power of the mirror of a telescope is dependent on the area of the mirror. The area of the mirror is (Ï€*d^2)/4. The variable 'd' is the diameter of the mirror. Therefore, if the diameter of A is four times the diameter of B, the light-gathering power of A will be (Ï€*4^2)/4 while that of B will be (Ï€*1^2)/4. This shows that A has 16 times that of B.
