2. Wave II Objectives Know that sound, seismic, water, and light waves have energy Explain how sound, seismic, water, and light waves can transfer energy when they interact with matter. Compare reflection, refraction, and diffraction. Differentiate between constructive and destructive interference. Illustrate the Doppler Effect and Shift and apply it to situations.

3. Waves & Matter When waves and matter interact the particles of the matter vibrate when the energy passes through them.

4. Waves Seismic Sound Water Light All waves transfer energy from one place to another. Therefore all waves have energy.

5. Reflection Reflection occurs when light (or any type of wave) “bounces” off a surface and changes direction. Many times the example of a pool ball bouncing off the side of the table is an example.

6. Reflection http://zonalandeducation.com/mstm/physics/light/rayOptics/reflection/reflec tion1.html

7. Refraction Refraction is the bending of light as it passes from one substance to another.

8. Refraction http://amazing- space.stsci.edu/resources/explorations/groundup/lesson/glossary/term- full.php?t=refraction

9. Refraction Refraction is the explanation as to why this straw looks like it is cut when put into the water.

10. Diffraction Light bending around an object or through an opening.

11. Constructive Interference Two waves hitting each other and aligning at their crests (with crests) and troughs (with troughs) to make a new wave. This results an increase in the amplitude of the new wave.

12. Destructive Interference Two waves hitting each other and that DO NOT align at their crest and toughs (crests align with troughs) to make a new wave. This results in each wave cancelling each other out or a decrease in amplitude.

13. Doppler Effect/Shift Doppler Effect – An increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other. The effect causes the sudden change in pitch noticeable in a passing siren, as well as the redshift seen by astronomers. Doppler Shift – Change in frequency due to the doppler effect