Lens and images ^Qrdh0j
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens g AC}
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens (tP>z+
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms 0 t m%Kd
images by bending the incoming light as it passes. Image formation can be understood by K_oBSa `
treating the incoming light as rays and using a simple geometric arguments. Like much of basic bgqN&J)Jr)
physics, this approach isn’t completely correct but is a good approximation. Because of the |dpOE<f[
geometric nature of the approximation, one can analyze a lens with geometry. This sort of 6gJy<a3
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the bqN({p&
system with ray tracings and with equations.
