If a 3-meter diameter telescope is doubled in size, then its new light collecting power would
A) not change.
B) double.
C) increase by a factor of four.
D) reduce by half.

Question

Quizplus · Accepted Answer

The light collecting power of a telescope is proportional to the area of its aperture. Doubling the diameter increases the area by a factor of four (since area is proportional to the square of the diameter).

If a 3-Meter Diameter Telescope Is Doubled in Size, Then