Lens and images <
<vE .
UHEn+T c>
Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens JM@}+pX
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens .#]
V5g,
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms u(s/4Lu
images by bending the incoming light as it passes. Image formation can be understood by TFWx(}1
treating the incoming light as rays and using a simple geometric arguments. Like much of basic s2{ d<0x?v
physics, this approach isn’t completely correct but is a good approximation. Because of the /@<Pn&Rq
geometric nature of the approximation, one can analyze a lens with geometry. This sort of YYz,sR'%|}
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the V2I"m
system with ray tracings and with equations.
