Lens and images L E&RY[
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens :X0k]p
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens .Fs7z7?Y
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms ?b*s.
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images by bending the incoming light as it passes. Image formation can be understood by B,<da1(a
treating the incoming light as rays and using a simple geometric arguments. Like much of basic kEJj=wx
physics, this approach isn’t completely correct but is a good approximation. Because of the +$u$<z 3Q
geometric nature of the approximation, one can analyze a lens with geometry. This sort of ! _f9NK
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the p%#<D9S
system with ray tracings and with equations.
