CourseNotes.64 - Figure 45: Converging and Diverging Lenses...

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Figure 45: Converging and Diverging Lenses A ray that is initially heading toward the center of the lens will emerge from the lens with no change in its direction for both types of lens. 16 Chapter 35: Interference We encountered the idea of interference in our first semester physics course when discussing the concept of waves. The basic idea behind interference is that waves, in general, obey the principle of superposition and when they combine can add up to produce a larger wave or cancel out to produce a smaller wave (or none at all). This concept was fairly simple in wave mechanics because we mostly dealt with waves traveling along one dimension like on a string. It is a bit more complicated to apply to optics because optical waves travel in three dimensions. This complication does lead to some rather amazing results however. Before we delve into some of these interesting properties, lets discuss an interesting way of thinking about traveling light waves. Hyugens’ Principle
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This note was uploaded on 12/05/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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