| qshpang |
2007-05-05 14:30 |
Lens and images
Lens and images $jc&Tk#
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens 9{ A[n}
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens Hv>16W$_
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms cC Ny W2'
images by bending the incoming light as it passes. Image formation can be understood by g }%$VUSA
treating the incoming light as rays and using a simple geometric arguments. Like much of basic *ommU(r8
physics, this approach isn’t completely correct but is a good approximation. Because of the P 2 j"L#%
geometric nature of the approximation, one can analyze a lens with geometry. This sort of dR^7d _!
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the 3 7F&s
system with ray tracings and with equations.
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