<h2>Telescopes Summary</h2>
<ul>
<li>Simple telescopes can be made with two lenses. They are used for viewing objects at large distances and utilize the entire range of the electromagnetic spectrum.</li>
<li>The angular magnification M for a telescope is given by

<p>\(M=\cfrac{\theta \prime }{\theta }=-\cfrac{{f}_{\text{o}}}{{f}_{\text{e}}}\text{,}\)</p>

where \(\theta \) is the angle subtended by an object viewed by the unaided eye, \(\theta \prime \) is the angle subtended by a magnified image, and \({f}_{\text{o}}\) and \({f}_{\text{e}}\) are the focal lengths of the objective and the eyepiece.</li>
</ul>
<h2>Glossary</h2>
<h3>adaptive optics</h3>
<p>optical technology in which computers adjust the lenses and mirrors in a device to correct for image distortions</p>
<h3>angular magnification</h3>
<p>a ratio related to the focal lengths of the objective and eyepiece and given as \(M=-\cfrac{{f}_{\text{o}}}{{f}_{\text{e}}}\)</p>
<section data-element-type="conceptual-questions"></section>

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Summarizing Telescopes

Physics is a science discipline concerned with the nature and properties of matter and energy. Physics topics include mechanics, heat, light and radiation, sound, electricity, magnetism, the structure of atoms, and so on.

Physics

Discover the fundamentals of vision and optical devices, including the physics of the eye, vision correction, color vision theories, and the workings of microscopes and telescopes while also learning about aberrations.


Summarizing Telescopes

Telescopes Summary

Glossary

adaptive optics

angular magnification

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