4-22

Physics class started out today with a graded daily question dealing with formulas on //__frequency__// and //__wavelength:__//

** //f// = 1///T// ** The problems were very similar to other problems that we have worked on recently, and was just a refresher for the new material that we would be learning. Then, Mr. Manning continued notes from yesterday's class on interference (p.11). and explained several things about it's meaning: - **Constructive Interference**: means that both waves are the same. (+ or -).

- **Negative Interference**: means that both waves are on opposite sides. Then the class practiced problems on determining if a set of waves are constructive or negative by looking at a picture of two waves colliding (interfering)..
 * //__Proper Definition__//**: The addition (superposition) of two or more waves that result in a new wave pattern.

After working on problems with interference, Mr. Manning finished up the class with notes on the **//Superposition Principle//**. (p.13) The superpostion principle deals with adding two waves. By looking at graphs, we can add two waves together, and find the resulting sum of the two.

For Example: If one trough of the wave was at -5, and the crest on the opposite wave was 2, then the resulting wave would be at -3. The Superposition Principle is a simple Concept.