Lens and images Ht@5@(W]I
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens fw a*| y;
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens czB),vooz
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms -KZ9TV # R
images by bending the incoming light as it passes. Image formation can be understood by j(M.7Z7^
treating the incoming light as rays and using a simple geometric arguments. Like much of basic IYr}%:P)
physics, this approach isn’t completely correct but is a good approximation. Because of the xU(b: D Z
geometric nature of the approximation, one can analyze a lens with geometry. This sort of EoS6t
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the +6n\5+5
system with ray tracings and with equations.
