Lens and images zg7G^!PU
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens -Qg ,99M
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens 9RB`$5F ;
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms z1}1*F"
images by bending the incoming light as it passes. Image formation can be understood by p Dm K
treating the incoming light as rays and using a simple geometric arguments. Like much of basic 4n4j=x]@
physics, this approach isn’t completely correct but is a good approximation. Because of the 1(# RN9
geometric nature of the approximation, one can analyze a lens with geometry. This sort of CnQg *+
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the U%n,XOJ
system with ray tracings and with equations.
