8.2b Constructive & Destructive Interference Conditions | Superposition | Cambridge A Level Physics

How would the path and phase difference tell us that there will be constructive interference (maxima) or destructive interference (minima) when two waves meet at a point?
00:00 Intro recap
00:38 Two paths to reach a point
02:52 Conditions for Constructive Interference
09:46 Conditions for Destructive Interference
14:47 Point P is a maxima or minima?

AS #Superposition Chapter Playlist:
https://www.youtube.com/playlist?list=PLXli3LrRvG-bYG-ARTDYkBpOmYLcTBQde

AS #Waves Chapter Playlist:
https://www.youtube.com/playlist?list=PLXli3LrRvG-ZBAwUxzhBAEsw346ViDsfD

SIMULATIONS:
Double Source Interference (https://www.geogebra.org/m/Tm7x7hhp)
Superposition Experiments (https://phet.colorado.edu/en/simulations/wave-interference)
Path Difference of Waves (https://www.geogebra.org/m/jkqmuvne)
Path Difference Triangle (https://www.geogebra.org/m/G7Yrkr8Z)

PRACTICE QUESTIONS
ON19 P12 Q27 (pg32) Outdoor Concert
ON19 P11 Q26 (pg31) Two pulses
MJ19 P13 Q28 (pg30) Why zero intensity?
FM19 P12 Q28 (pg28) Intensity Graph
ON18 P12 Q29 (pg27) Path Diff Equation
MJ18 P11 Q26 (pg23) Amplitude at Point
MJ17 P12 Q29 (pg22) Possible Path Difference
MJ15 P13 Q29 (pg16) Possible wavelengths?
MJ15 P12 Q26 (pg15) Essential Conditions
ON14 P11 Q26 (pg14) Intensity Graph
MJ14 P12 Q27 (pg13) Equations for position
ON13 P12 Q29 (pg12) Increase fringe separation

ON19 P22 Q5 (pg35) Path triangle & reflection
ON19 P21 Q5 (pg34) Two Dippers & drawing
MJ17 P22 Q6c (pg17) Two water waves*
FM16 P22 Q4 (pg17) Path difference & Intensity
ON15 P22 Q7 (pg14) Two dippers
MJ13 P23 Q5 (pg7) Reflected path difference.

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