Lens and images UIzk-.<
e euAo&L&
Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens b$g. ">:$
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens 3Dg I.V6un
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms 4? 8 GK
images by bending the incoming light as it passes. Image formation can be understood by 1=#`&f5f&
treating the incoming light as rays and using a simple geometric arguments. Like much of basic !74* APPHR
physics, this approach isn’t completely correct but is a good approximation. Because of the ~*G I<n
geometric nature of the approximation, one can analyze a lens with geometry. This sort of V
GM/ed5-
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the M}us^t*
system with ray tracings and with equations.
