Lens and images !^0vi3I
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens OQ 4h8,
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens $XMpC{
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms X !0 7QKs
images by bending the incoming light as it passes. Image formation can be understood by JTB t=u{6^
treating the incoming light as rays and using a simple geometric arguments. Like much of basic 2DJg__( "
physics, this approach isn’t completely correct but is a good approximation. Because of the KECW~e`
geometric nature of the approximation, one can analyze a lens with geometry. This sort of |#yT]0L%pA
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the w{*V8S3h9
system with ray tracings and with equations.
