Lens and images AXpyia7nU
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens dxF)) Z
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens E)( Rhvij
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms hu- 6V="^9
images by bending the incoming light as it passes. Image formation can be understood by U p: M[S
treating the incoming light as rays and using a simple geometric arguments. Like much of basic Ba;tE F{X
physics, this approach isn’t completely correct but is a good approximation. Because of the H`8}w{ ft&
geometric nature of the approximation, one can analyze a lens with geometry. This sort of w'P !<JaZ
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the ]Hrw$\Ky
system with ray tracings and with equations.
