File:OpenStax Astronomy refracting and reflecting telescopes.jpg

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OpenStax_Astronomy_refracting_and_reflecting_telescopes.jpg (722 × 541 pixels, file size: 153 KB, MIME type: image/jpeg)

Captions

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Refracting and Reflecting Telescopes. Light enters a refracting telescope through a lens, which then focuses the light. In contrast, reflection telescopes use one or more mirrors to focus and magnify the image. Credit: OpenStax/Rice University. CC-B
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Summary

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Description
English: Refracting and Reflecting Telescopes. Light enters a refracting telescope through a lens at the upper end, which focuses the light near the bottom of the telescope. An eyepiece then magnifies the image so that it can be viewed by the eye, or a detector like a photographic plate can be placed at the focus. The upper end of a reflecting telescope is open, and the light passes through to the mirror located at the bottom of the telescope. The mirror then focuses the light at the top end, where it can be detected. Alternatively, as in this sketch, a second mirror may reflect the light to a position outside the telescope structure, where an observer can have easier access to it. Professional astronomers’ telescopes are more complicated than this, but they follow the same principles of reflection and refraction. Credit: OpenStax/Rice University. CC-BY. Image appears in OpenStax Astronomy, by Andrew Fraknoi, David Morrison, and Sydney C. Wolff.
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Author OpenStax

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current20:37, 19 January 2020Thumbnail for version as of 20:37, 19 January 2020722 × 541 (153 KB)OpenStax (talk | contribs)User created page with UploadWizard

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