At the far left is the convex objective lens. It has a focal length f1 , the length at which it brings light from a distant object to a focus. The concave ... |
Galilean Telescope. • The rays from the object lens are intercepted by a concave lens before they form an image. The concave lens is positioned so that the ... |
High-plus-eyepiece telescopes are called astronomical (or Keplerian) telescopes; and high-minus-eyepiece telescopes are called Galilean (or terrestrial) ... |
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