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View Full Version : Interference Optics Phasors: how to add these 3 phasors? cos(Θ-π), cos(Θ+π), 3cos(Θ)?


grooveactiva
Nov4-09, 06:55 AM
1. The problem statement, all variables and given/known data
3 waves are represented by these 3 waves inteferring:
cos(Θ-π), cos(Θ+π), 3cos(Θ)?
cos(\theta-\pi), cos(\theta+\pi), 3cos(\theta).

If I want to diagram these, does the cos(\theta-\pi) and cos(\theta+\pi), cancel each other out?

Do I need to convert them to sine functions or can I leave them cosine functions?


2. Relevant equations
cos(Θ-π), cos(Θ+π), 3cos(Θ).
cos(\theta-\pi), cos(\theta+\pi), 3cos(\theta).




3. The attempt at a solution

lanedance
Nov4-09, 09:35 AM
can you use complex exponentials, and is there any time dependence?