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>Light</strong> as a wave…<br />
• <strong>Light</strong> has wave-like properties…<br />
! diffraction<br />
! interference<br />
Pho<strong>to</strong>ns: light as a particle<br />
• <strong>Light</strong> has particle-like properties…<br />
! travels in straight line<br />
! <strong>and</strong> “bounces”<br />
! i.e. reflects<br />
! transfers energy in discrete “quanta”<br />
Pho<strong>to</strong>electric Effect: blue<br />
pho<strong>to</strong>ns knock electrons<br />
off metal; red pho<strong>to</strong>ns don’t,<br />
even lots of them.<br />
diffraction of<br />
water waves<br />
diffraction of light
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