Superposition and Interference
PHYS 210 · Module 4
This module explores what happens when waves overlap. Students study the superposition principle, constructive and destructive interference, beats, and the basic idea of Fourier analysis.
Lessons in this module
The superposition principle
The superposition principle says overlapping waves add. This lesson introduces linearity, wave addition, pulses, and why superposition underlies interference.
Constructive and destructive interference
Interference occurs when overlapping waves combine to reinforce or cancel. This lesson explains phase difference, path difference, and conditions for constructive and destructive interference.
Beats
Beats occur when two waves of slightly different frequencies interfere. This lesson derives the beat frequency and explains its use in tuning and wave analysis.
Introduction to Fourier analysis
Fourier analysis shows how complicated waves can be built from simple sine and cosine waves. This lesson introduces harmonic components, spectra, and why Fourier ideas are central to wave physics.
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