| qshpang |
2007-05-05 14:30 |
Lens and images
Lens and images RSG4A>%!mI
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens 2[[ pd&MJZ
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens 9j49#wG0"B
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms wHWd~K_q
images by bending the incoming light as it passes. Image formation can be understood by 7Nh 6 `
treating the incoming light as rays and using a simple geometric arguments. Like much of basic v s{i2!^
physics, this approach isn’t completely correct but is a good approximation. Because of the ZWG$MF Ejl
geometric nature of the approximation, one can analyze a lens with geometry. This sort of
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approach is called ray tracing. In today’s lab, we will form images with lens and analyze the 1'"o; a]k/
system with ray tracings and with equations.
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