Lens and images ;r"r1'a+@
5!Y \STn
Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens 1z&"V}y
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens Qf y_@w]
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms lg$aRqI29
images by bending the incoming light as it passes. Image formation can be understood by urx?p ^c
treating the incoming light as rays and using a simple geometric arguments. Like much of basic eF{uWus
physics, this approach isn’t completely correct but is a good approximation. Because of the ~b)X:ku
geometric nature of the approximation, one can analyze a lens with geometry. This sort of `^8mGR>OpI
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the w2'z~\dG8
system with ray tracings and with equations.
