Lens and images yMz#e0 k
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens k sv ]
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens Vc(4d-d5
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms ._G ,uP$
images by bending the incoming light as it passes. Image formation can be understood by 09-8Xzz
treating the incoming light as rays and using a simple geometric arguments. Like much of basic ~a ([e\~
physics, this approach isn’t completely correct but is a good approximation. Because of the <{kPa_`'
geometric nature of the approximation, one can analyze a lens with geometry. This sort of >J7slDRo
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the EfEgY|V0
system with ray tracings and with equations.
