Reflector Telescopes
A reflector telescope, on the other hand, uses concave (bending inwards - like a cave) mirrors. As the diagram illustrates light travels down the tube where it is reflected (hence the name reflector) up to a secondary mirror near the top of the tube which directs the light into the eyepiece. This exact system is known as a Newtonian Reflector. There are quite a few variations on this including the Georgian and Cassegrain reflectors.
