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Wave Interactions Ch 14 Section 3 Pages 472-478 108.

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Presentation on theme: "Wave Interactions Ch 14 Section 3 Pages 472-478 108."— Presentation transcript:

1 Wave Interactions Ch 14 Section 3 Pages 108

2 Waves interact with other objects and waves
They can Reflect Refract Diffract Interference What are the four things a wave can do? 108

3 Reflection The bouncing back of a ray of light, sound or heat when the ray hits a surface that it does not go through 109

4 Law of Reflection copy this picture!!!
The angle of incidence equals the angle of reflection The normal is a line perpendicular to the surface 109 copy this picture!!!

5 Diffraction The bending of waves around an edge
When waves pass the edge of an object or pass through an opening they spread out as if a new wave were created there 110

6 Diffraction of Sound 110 Draw only                                                                             

7 Refraction The bending of a wave front as it passes between two substances in which the speed of the wave differs 111 Animation courtesy of Dr. Dan Russell, Kettering University

8 Interference The combination of two or more waves May be: Constructive
Destructive This one is constructive 112

9 Constructive Interference
The crests of two waves overlap each other Results in a larger wave— A + B add together Also called in phase Lasers use this 112

10 Shock ABSORBERS Read page 458

11 Destructive Interference
Waves crests and troughs align and result in cancellation Used in anti-noise technology 113

12 Interference of Light Causes colorful displays Oil slicks on sidewalks
Soap bubbles 113

13 Interference of sound produces beats
Band members listen for beats to tell if they are out of tune 108 113

14 Review

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