Lens and images N] pw7S%
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens ta'wX
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens 6?JvvS5
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms VCIV*5
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images by bending the incoming light as it passes. Image formation can be understood by `_]Ul I_h
treating the incoming light as rays and using a simple geometric arguments. Like much of basic | 1e//*
physics, this approach isn’t completely correct but is a good approximation. Because of the ^7t1 'A8e<
geometric nature of the approximation, one can analyze a lens with geometry. This sort of ()n2 KT
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the #>s I XY
system with ray tracings and with equations.
