| qshpang |
2007-05-05 14:30 |
Lens and images
Lens and images ( n!8>>+1C
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens Nfd'|#
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens Y";K WA}b
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms P\$%p-G
images by bending the incoming light as it passes. Image formation can be understood by !dwa. lZ&X
treating the incoming light as rays and using a simple geometric arguments. Like much of basic 5~RR
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physics, this approach isn’t completely correct but is a good approximation. Because of the cE *d (g
geometric nature of the approximation, one can analyze a lens with geometry. This sort of Md*.q^:
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the dSE"G>l8
system with ray tracings and with equations.
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