| qshpang |
2007-05-05 14:30 |
Lens and images
Lens and images )OV2CP
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens nrCr9#
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens }RZN3U=
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms {GS $7n
images by bending the incoming light as it passes. Image formation can be understood by $J]o\~Z J
treating the incoming light as rays and using a simple geometric arguments. Like much of basic Og(|bs!6
physics, this approach isn’t completely correct but is a good approximation. Because of the w~WW 2 w
geometric nature of the approximation, one can analyze a lens with geometry. This sort of >e QFY^d5
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the "ac$S9@~
system with ray tracings and with equations.
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