Refracting Telescopes

A ray diagram of a Refracting Telescope
The Eyepiece (another, smaller lens) is used to magnify the image for us to look at.

A ray diagram of a Refracting Telescope
The Eyepiece (another, smaller lens) is used to magnify the image for us to look at.
The Earth's atmosphere
is mainly composed of
Nitrogen and Oxygen, and
provides the air that we
breathe and the wind that
blows in our face.