Lens and images H3CG'?{ _
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens W<|
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have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens cuzU *QW"g
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms = Lt)15
images by bending the incoming light as it passes. Image formation can be understood by AtU%S9
treating the incoming light as rays and using a simple geometric arguments. Like much of basic xU <WUfS1
physics, this approach isn’t completely correct but is a good approximation. Because of the pZ Hx
geometric nature of the approximation, one can analyze a lens with geometry. This sort of n .is+2t
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the |I \&r[J
system with ray tracings and with equations.
