Lens and images {`RCh]W
h{ xq
Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens $2!|e,x
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens CuT~
Bj
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms Q[rmsk 2L'
images by bending the incoming light as it passes. Image formation can be understood by JSp V2c 5Q
treating the incoming light as rays and using a simple geometric arguments. Like much of basic Y \7WCaSgi
physics, this approach isn’t completely correct but is a good approximation. Because of the g>gVO@"b2
geometric nature of the approximation, one can analyze a lens with geometry. This sort of z5njblUz
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the oItEGJ|
system with ray tracings and with equations.
