Lens and images @$ p6w
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens 32j #kJ W
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens nip*Y@- F
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms I%[Tosud<
images by bending the incoming light as it passes. Image formation can be understood by pox; NdX7
treating the incoming light as rays and using a simple geometric arguments. Like much of basic 9.~ _swkv
physics, this approach isn’t completely correct but is a good approximation. Because of the iSX:H;
geometric nature of the approximation, one can analyze a lens with geometry. This sort of "tmu23xQ
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the r4 5}o
system with ray tracings and with equations.
