Lens and images F X2`p_
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens 2`U&,,-Mf
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens %9Fg1LH42r
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms 1 AV1W_"
images by bending the incoming light as it passes. Image formation can be understood by 5g2+Ar(
treating the incoming light as rays and using a simple geometric arguments. Like much of basic
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physics, this approach isn’t completely correct but is a good approximation. Because of the aKtTx~$@
geometric nature of the approximation, one can analyze a lens with geometry. This sort of *)D*iU&
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the vkgL"([_
system with ray tracings and with equations.
