Interference - A Level Physics - Master the A* questions on waves
Channel: Kit Betts-Masters
Date: 05/05/2020

Interference patterns happen when two circular wave forms overlap and superpose.  Points where the path difference is a multiple of the wavelength the waves arrive in phase, and you get constructive interference.  points where the path difference is an odd multiple of half wavelengths, waves arrive pi out of phase and you get destructive interference.  

This video explains how you get interference patterns with sound, with water waves and with laser light. 

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