HOW IT
WORKS
  1. Light hits the lens like in the refracting telescope.
  2. The light then reaches the primary mirror, 3/4 of the length of the telescope away from the lens. The light is bounced off the primary mirror to the secondary mirror.
  3. The secondary mirror sits at a 45o angle, so that the objects can be seen through the eyepiece, which sits on top of the telescope at a 90o angle to the entering light.
BACK
Please send any comments to:
Curator:
Tom.Benson@grc.nasa.gov
Responsible Official: Kathy.Zona@grc.nasa.gov