Optical Telescopes and Cameras
can form “Images”
The light leaving one point on
gets “reassembled” at one point on the
In a camera you put film or an electronic sensor at the image to record it.
In a telescope you put a magnifying glass (an eyepiece) near the image to
see a magnified version of it.
Most astronomers don’t spend much time looking through telescopes
– they put recording devices at the image and use them as large cameras.
From our text:
Horizons, by Seeds