| qshpang |
2007-05-05 14:30 |
Lens and images
Lens and images BbUZ,X*Y
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens P!'Sx;C^f
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens c 6@!?8J
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms ]R\k@a|G
images by bending the incoming light as it passes. Image formation can be understood by &\4AvaeA8y
treating the incoming light as rays and using a simple geometric arguments. Like much of basic PmyS6a@
physics, this approach isn’t completely correct but is a good approximation. Because of the ~ z*
geometric nature of the approximation, one can analyze a lens with geometry. This sort of N_Cu%HP
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the x0@J~
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system with ray tracings and with equations.
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