Lens and images U)~#g'6:8
BjD&> gO)
Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens @ M[Q $:
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens [
-12]3
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms BvJ=iB<E
images by bending the incoming light as it passes. Image formation can be understood by y&rY0bm
treating the incoming light as rays and using a simple geometric arguments. Like much of basic _7 `E[&v
physics, this approach isn’t completely correct but is a good approximation. Because of the uX0
Bp8P
geometric nature of the approximation, one can analyze a lens with geometry. This sort of DcU C,
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the 7|~:P $M
system with ray tracings and with equations.
