1. Wave Interaction
Chapter 1.3

2. 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

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

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

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

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

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

9. Refraction
Example:

10. 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

11. Diffraction

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

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

15. Interference
Constructive and Destructive.

16. Constructive

17. Destructive

18. Interference

21. Standing waves
Incoming wave and reflected wave

22. 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.

24. Standing wave
Nodes
Antinodes
Wavelength
Two Antinodes

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

28. The end