52_2_points - Lesson 52: Interference from Two Point...

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Lesson 52: Interference from Two Point Sources We can actually learn a lot about individual waves by looking at how they interact with other waves. You have already seen this, in examples of superpositioning. Another way is to look at how two sources of waves can create complex patterns of waves, and how those patterns form and repeat. We will start off with two separate point sources making waves in-phase. In-phase just means that, even though they are separate, they are doing the same thing at the same time. For example, as one of the sources is making a crest, the other source is also making a crest. The two sources will also be creating waves that are identical in wavelength, frequency, velocity, and amplitude. Look at how the crests and troughs of the waves produced by the two point sources interact in the following diagram. You'll notice that the two point sources are exactly the same in every way, and that their waves cross over each other in a very regular pattern. What we must examine is the way that the crests and troughs pass each other to cause either constructive or destructive interference. Central Maximum
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This note was uploaded on 12/02/2011 for the course PHYSICS 235 taught by Professor Staff during the Fall '08 term at Rutgers.

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52_2_points - Lesson 52: Interference from Two Point...

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