Lens and images ik(YJw'i7E
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens ux TgK'3
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens )]C]K B
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms b:F;6X0~Hl
images by bending the incoming light as it passes. Image formation can be understood by )^o. H~Pv
treating the incoming light as rays and using a simple geometric arguments. Like much of basic ,.9 lz
physics, this approach isn’t completely correct but is a good approximation. Because of the Uyb0iQ-,s
geometric nature of the approximation, one can analyze a lens with geometry. This sort of `qs,V
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the qF~9:`
system with ray tracings and with equations.
