1) Wave interference occurs when two waves meet while traveling along the same medium, causing the medium to take on a shape resulting from the net effect of the individual waves. 2) Constructive interference occurs when wave displacements are in the same direction, like two crests or two troughs meeting, increasing displacement. Destructive interference occurs when displacements oppose each other, like a crest and trough meeting, decreasing displacement. 3) When waves interfere according to the principle of superposition, the resulting displacement at each location is the algebraic sum of the individual displacements. This can produce standing wave patterns with points of no displacement called nodes and maximum displacement called antinodes.

2. Unit 1 - Waves Interference of Waves

4. Unit 1 - Waves Interference of Waves

9. Unit 1 - Waves Interference of Waves

11. Unit 1 - Waves Superposition of Waves

14. Unit 1 - Waves Standing Waves

17. Unit 1 - Waves Standing Waves

18. Unit 1 - Waves Wave Interference Lab