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Refracting Telescopes - an overview | ScienceDirect Topics
Refracting Telescope: Definition, Ray Diagram, and Examples
Draw a labelled ray diagram of a refracting telescope. Define its magnifying power and write the expression for it. Write two important limitations of a refracting telescope over a reflecting type telescope.
telescope - Kids | Britannica Kids | Homework Help
telescope summary | Britannica
Abrams Planetarium Telescope Information Page
Optical telescope
Reflecting Telescope: Definition, Optics, Design and Diagram