Lens and images P ! _rEV
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens Ll4g[8
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens aYSCw 3C<
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms 7K98#;a)5
images by bending the incoming light as it passes. Image formation can be understood by :n-]>Q>5=k
treating the incoming light as rays and using a simple geometric arguments. Like much of basic Uw7h=UQh
physics, this approach isn’t completely correct but is a good approximation. Because of the >o=-$g z`
geometric nature of the approximation, one can analyze a lens with geometry. This sort of \vO,E e~#W
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the &:` U&06q
system with ray tracings and with equations.
