Ch. 12 Waves pgs. 436 - 468.

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Presentation transcript:

Ch. 12 Waves pgs. 436 - 468

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

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

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

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

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

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.

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

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

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