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Physics · College

College Physics: Waves and Optics

Calculus-based wave phenomena, interference, and optics concepts for a college physics sequence, distinct from the mechanics and E&M decks.

40 cards · basic cards · AI-written, checked twice. Edit anything.

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Wave speed v in terms of frequency f and wavelength lambda
v = f * lambda
Period T of a wave
Time for one complete oscillation
Frequency f in terms of period T
f = 1/T
General sinusoidal wave equation y(x,t)
y(x,t) = A sin(kx - omega*t + phi)
Wave number k
k = 2*pi/lambda
Angular frequency omega in terms of frequency f
omega = 2*pi*f
Intensity I of a wave
Average power per unit area; proportional to amplitude squared
Superposition principle for waves
Net displacement at a point is the vector sum of displacements from all individual waves
Path difference for constructive interference
Delta = m*lambda where m = 0, 1, 2, ...
Path difference for destructive interference
Delta = (m + 1/2)*lambda where m = 0, 1, 2, ...
Path difference between two slits at angle theta in Young's experiment
Delta = d*sin(theta) where d is slit separation
Bright fringe positions in Young's double slit (small angle approximation)
y = m*lambda*L/d where m = 0, 1, 2, ...; L is distance to screen
Dark fringe positions in single slit diffraction
a*sin(theta) = m*lambda where m = 1, 2, 3, ...; a is slit width
Standing wave definition
Wave pattern from two waves traveling in opposite directions with same frequency and amplitude
Wavelengths for standing waves on a string fixed at both ends
lambda_n = 2*L/n where n = 1, 2, 3, ... and L is string length

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