Telescopes: Refractor vs Reflector

Telescopes: Refractor vs Reflector

(alt-text)

On the other hand, the refractor's limited light-gathering means it's unable to make out shadow people or the dark god Chernabog.

What If? is on YouTube! The first video answers
“What if we aimed Hubble at Earth?” Follow the
What If? channel to be notified about new videos.