Lens and images $7\!
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens },tN{()
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens BAy]&q|.
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms 5Xe1a'n5]
images by bending the incoming light as it passes. Image formation can be understood by `X mT)C
treating the incoming light as rays and using a simple geometric arguments. Like much of basic p|q } z /
physics, this approach isn’t completely correct but is a good approximation. Because of the b ~5Q|3P 9
geometric nature of the approximation, one can analyze a lens with geometry. This sort of =Su~i Oa
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the O|ODJOQNol
system with ray tracings and with equations.
