The light-gathering power of a 4-meter telescope is ________ than that of a 2-meter telescope.
A) 8 times larger
B) 4 times larger
C) 16 times smaller
D) 2 times smaller

Question

Quizplus · Accepted Answer

The light-gathering power of a telescope is proportional to the area of its aperture, which is proportional to the square of the diameter. Therefore, a 4-meter telescope has (4/2)^2 = 4 times the light-gathering power of a 2-meter telescope.

The Light-Gathering Power of a 4-Meter Telescope Is ________ Than