Lens and images <xe_t=N
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens @t;726
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens ~ToU._
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms !
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images by bending the incoming light as it passes. Image formation can be understood by -$X4RS
treating the incoming light as rays and using a simple geometric arguments. Like much of basic Abi(1nXdQ
physics, this approach isn’t completely correct but is a good approximation. Because of the $}'(%\7"
geometric nature of the approximation, one can analyze a lens with geometry. This sort of .
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approach is called ray tracing. In today’s lab, we will form images with lens and analyze the BOh^oQh
system with ray tracings and with equations.
