The largest visible-light telescopes in the world use what device to collect as much light as possible before the light is brought to a focus (to act as the "light bucket")?
A) a lens
B) a spectroscope
C) a CCD
D) a mirror
E) a valley in Puerto Rico

Question

Quizplus · Accepted Answer

The largest visible-light telescopes in the world use a mirror to collect as much light as possible before the light is brought to a focus. This is known as a reflecting telescope.

The Largest Visible-Light Telescopes in the World Use What Device