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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Visual observing: what you care about<br />
• Aperture size: light collecting area<br />
! larger diameter telescopes can see fainter objects<br />
• Magnification: how much larger object appears through<br />
eyepiece than <strong>to</strong> naked eye<br />
! depends on design of telescope <strong>and</strong> eyepieces<br />
! changing eyepieces changes magnification<br />
• Field of view: how much of the sky you can see at once<br />
! depends on design of telescope <strong>and</strong><br />
Large telescopes collect more light…<br />
• Telescope funnels light <strong>to</strong> <strong>to</strong> your eye<br />
! the larger the aperture, the more light collected
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