Lens and images $L@os2
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens {I]X-+D|_
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens t%B ,ATW
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms qjtrU#n
images by bending the incoming light as it passes. Image formation can be understood by zG[GyyAQ
treating the incoming light as rays and using a simple geometric arguments. Like much of basic SccaX
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physics, this approach isn’t completely correct but is a good approximation. Because of the [r)Hm/_=|U
geometric nature of the approximation, one can analyze a lens with geometry. This sort of CP%?,\
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the !_ng_,J
system with ray tracings and with equations.
