1. Ch. 12
Waves
pgs

2. Waves can pass through one another
The combination of two or more waves is known as the superposition principle.
Interference patterns form as waves pass through one another

3. Constructive Interference
two waves on the same side of equilibrium join to make a large wave as they pass each other.

8. Two types of constructive interference
1. complete constructive interference – waves are the
same size
2. incomplete constructive interference – waves are
different sizes

9. Destructive Interference
two waves on opposite sides of equilibrium combine to form a smaller wave as they pass each other.

14. Two types of destructive interference
1. complete destructive interference – waves are the
same size
2. incomplete destructive interference – waves are
different sizes

15. Reflection - when a wave hits a boundary and bounces back
Two types
1. At a free (moving) boundary waves are reflected and stay on the same side they started on.

16. 2. At a fixed boundary waves are reflected and are on the opposite side from the one started on.

17. Standing wave – has a fixed boundary at both ends
Consists of alternating regions of constructive and destructive interference
Consists of
nodes (N) - places of zero amplitude
antinodes - maximum amplitude

19. Ruben’s Tube Video Clip