Lens and images uGU 2
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens =RoE=) 1&-
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens 7Cz~nin>7
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms B=SA
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images by bending the incoming light as it passes. Image formation can be understood by l hUGo =
treating the incoming light as rays and using a simple geometric arguments. Like much of basic a>4/2#J
physics, this approach isn’t completely correct but is a good approximation. Because of the ~q>jXi
geometric nature of the approximation, one can analyze a lens with geometry. This sort of ;-d b/$O
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the {^]qaQ[5N
system with ray tracings and with equations.
