Lens and images '?L%F{g/9
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens <d<RK@2-
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens }-@I#9
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms - coy@S=.'
images by bending the incoming light as it passes. Image formation can be understood by M7pvxChA
treating the incoming light as rays and using a simple geometric arguments. Like much of basic 1'OD3~[R
physics, this approach isn’t completely correct but is a good approximation. Because of the $:HLRl{2E
geometric nature of the approximation, one can analyze a lens with geometry. This sort of <wqRk<
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the H.;yLL=
system with ray tracings and with equations.
