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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The electromagnetic spectrum<br />
• “White” light contains a<br />
mixture of colors…<br />
! similar <strong>to</strong> that in sunlight.<br />
• Our eyes are insensitive <strong>to</strong> most of the electromagnetic<br />
spectrum.<br />
Early studies of light…<br />
• Showed that it traveled at a finite speed…<br />
! Galileo tried <strong>to</strong> demonstrate this with lanterns<br />
! Olas Roemer succeeded with Jupiter’s moons<br />
• New<strong>to</strong>n developed a “particle” theory of light<br />
• Christian Huygens developed a “wave” theory<br />
! light waves analogous <strong>to</strong> sound waves<br />
In fact, they were both right…
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