Lens and images {<-wm-]mo
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens }^ j8<
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens ^ meU&
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms
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images by bending the incoming light as it passes. Image formation can be understood by >yHtGIHe-
treating the incoming light as rays and using a simple geometric arguments. Like much of basic )jg*u}u
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physics, this approach isn’t completely correct but is a good approximation. Because of the '> n&3`r5
geometric nature of the approximation, one can analyze a lens with geometry. This sort of 1eEML"
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the GIn%yB'
system with ray tracings and with equations.
