Lens and images 5iGz*_
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens x LK,Je
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens /5\{(= 0
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms 1X?q 4D"
images by bending the incoming light as it passes. Image formation can be understood by S7R*R}
treating the incoming light as rays and using a simple geometric arguments. Like much of basic }F3}"Ik'L
physics, this approach isn’t completely correct but is a good approximation. Because of the QX. U:p5C
geometric nature of the approximation, one can analyze a lens with geometry. This sort of H LE%f;
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the 8PG&/ " K
system with ray tracings and with equations.
