Lens and images hK]mnA[Y
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens +G: CR,Z>+
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens 'Fq +\J#%
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms T'6MAxEZUq
images by bending the incoming light as it passes. Image formation can be understood by iYaS
treating the incoming light as rays and using a simple geometric arguments. Like much of basic P{m(.EC_
physics, this approach isn’t completely correct but is a good approximation. Because of the vJ,r}$H3
geometric nature of the approximation, one can analyze a lens with geometry. This sort of W kP`qD3
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the ~fnu;'fN
system with ray tracings and with equations.
