Lens and images >jN)9}3>-#
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens s )~Q@ze2
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens ]#3=GFs/
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms gmJJ(}HVz
images by bending the incoming light as it passes. Image formation can be understood by |Vd)7/LN
treating the incoming light as rays and using a simple geometric arguments. Like much of basic @105 @9F
physics, this approach isn’t completely correct but is a good approximation. Because of the MJ}VNv|S
geometric nature of the approximation, one can analyze a lens with geometry. This sort of %ze Sx
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the K'1rS[^>R
system with ray tracings and with equations.
