Lens and images p<['FRf"
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens )cBV;
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have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens 9f [[%80
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms )F 2tV ]k\
images by bending the incoming light as it passes. Image formation can be understood by =9MH
treating the incoming light as rays and using a simple geometric arguments. Like much of basic ^K[tO54
physics, this approach isn’t completely correct but is a good approximation. Because of the j !n> d
geometric nature of the approximation, one can analyze a lens with geometry. This sort of 9@+X?Nhv5
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the /k Vc7 LC
system with ray tracings and with equations.
