Light, Optics and Telescopes Trip to Lick Observatory
Light, Optics and Telescopes Trip to Lick Observatory
Light, Optics and Telescopes Trip to Lick Observatory
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<strong>Telescopes</strong> for visual observing…<br />
• If your eye is the “detec<strong>to</strong>r”…<br />
! optics need <strong>to</strong> be more complicated<br />
• Eyepiece lens makes<br />
light rays parallel again…<br />
! your eye will<br />
focus them on<br />
retina<br />
Refrac<strong>to</strong>rs<br />
• Use a lens for primary focusing<br />
of light…<br />
• Many backyard<br />
telescopes are<br />
refrac<strong>to</strong>rs…<br />
! but its hard<br />
<strong>to</strong> make<br />
large ones
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