Wave Interaction Chapter 1.3.

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Presentation transcript:

Wave Interaction Chapter 1.3

How waves interact and respond Terms to know Reflection Refraction Law of reflection Diffraction Interference Terms to know Constructive interference Standing wave Node Antinode Resonance

Reflection When you bounce a ball against a wall what happens? At what angle does it come off the wall?

Reflection Reflection is when an object or a wave hits a surface through which it can not pass, and it bounces back.

Angles Now Apply it to light… They are equal! Angle of incidence Angel of reflection They are equal!

Refraction When a wave enters a new medium at an angle one side of the wave changes speed before the other side.

Refraction The bending of waves due to a change in speed when passing into a new medium. A minimum of 2 mediums are required!

Refraction Example:

Diffraction When a wave moves around a barrier it bends and spreads out due to a change in speed along a portion of the wave! Friction causes the wave to slow down. Only 1 medium is required for Diffraction

Diffraction

Diffraction When a wave moves around a barrier it bends and spreads out.

Interference Interactions between waves when they meet. 1. Constructive Interference 2. Destructive Interference

Interference Constructive and Destructive.

Constructive

Destructive

Interference http://www.colorado.edu/physics/2000/schroedinger/index.html

Standing waves Incoming wave and reflected wave

Standing waves Incoming wave and reflected wave If an incoming wave and a reflected wave have just the right frequency they produce a combined wave that appears to be standing still.

Standing wave Nodes Antinodes Wavelength Two Antinodes

Resonance An increase in a wave’s amplitude when outside waves increase the amplitude of an object's natural frequency Musical instruments use this.

The end