Lens and images X2b<_j3
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens 8
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have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens 2\h]*x% :
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms 6u>${}
images by bending the incoming light as it passes. Image formation can be understood by 90OSe{
treating the incoming light as rays and using a simple geometric arguments. Like much of basic 9-)D "ZhLe
physics, this approach isn’t completely correct but is a good approximation. Because of the &oJ =
geometric nature of the approximation, one can analyze a lens with geometry. This sort of AF5.)Y@.
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the
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system with ray tracings and with equations.
