Physics 202 Lecture 9 Geometric Optics.

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Physics 202 Lecture 9 Geometric Optics

Geometric optics ignores the wave nature of light and is based on geometric laws http://en.wikipedia.org/wiki/Ray_tracing_(graphics) http://en.wikipedia.org/wiki/Ray_tracing_(physics) http://en.wikipedia.org/wiki/Reflection_(physics) http://en.wikipedia.org/wiki/Mirror_image

A curved mirror will act as a lens creating a magnified image based on its focal length http://en.wikipedia.org/wiki/Hubble_telescope http://en.wikipedia.org/wiki/Parabolic_antenna

In a ray diagram, we only need a few key rays to identify the image location http://en.wikipedia.org/wiki/Curved_mirror

Image distance and magnification is related to object distance and lens focal length

Snell’s law governs the angles involved in refraction and is related to the speed of light http://en.wikipedia.org/wiki/Refraction http://en.wikipedia.org/wiki/Total_internal_reflection http://en.wikipedia.org/wiki/Optical_fiber

Transparent lenses obey same geometric formulas with a different sign convention http://en.wikipedia.org/wiki/Lens_(optics) http://en.wikipedia.org/wiki/Optical_telescope

Most transparent materials are dispersive which explains prisms and rainbows http://en.wikipedia.org/wiki/Lens_(optics) http://mirror-sg-wv1.gallery.hd.org/_tn/std/natural-science/prism-and-refraction-of-light-into-rainbow-2-AJHD.jpg http://en.wikipedia.org/wiki/Rainbow http://www.hash.com/am2004/Choreoraphy/Attenuation/Light%20Attenuation.htm

Double refraction and the problem of polarization http://eo.wikipedia.org/wiki/Dosiero:3310.calcite_(Iceland_Spar)_birefringence.jpg http://en.wikipedia.org/wiki/File:Wire-grid-polarizer.svg

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