2. Waves, Light, Sound and Color

3. Waves Transfer energy through matter or space

4. Waves May be longitudinal Or transverse

5. Waves

6. Waves travel through a medium such as: water air solids

7. Wave Properties reflection refraction interference

8. Wave Properties Diffraction: the bending of a wave around the edge of a barrier.

9. Reflection, refraction, diffraction and interference

10. Sound waves LLLLongitudinal waves NNNNeed a medium to travel through SSSSpeed of sound is 340 m/s in air

11. Water waves Water waves have transverse and longitudinal characteristics. Energy is transferred, but the particles stay essentially in the same place

12. Light: particle or wave?

14. Light particles are called photons

15. Light: Particle or wave?  BOTH!!  Light does not need a medium to travel through.

16. Doppler effect CCCChange in frequency and pitch of a sound. DDDDue to the motion of either the sound source or the observer. LLLListen!

17. Doppler effect of sound

18. Doppler effect in light  As stars move away from earth, there is a shift in the light towards the red end of the spectrum.

22. Color When light strikes a surface, it can be transmitted, absorbed, or reflected

23. Transmission of light When light is transmitted, a substance is said to be transparent. The color that is transmitted is the color that reaches your eye.

24. Transparent objects transmit color Red glass absorbs all colors of light except red, which it transmits.

25. Absorption of light

26. Reflection and absorption of light Opaque objects reflect and absorb light. The color of an opaque object is the color it reflects.

27. Opaque objects reflect and absorb light This apple reflects red and absorbs all other colors.

28. Translucent objects transmit some light

30. Color Primary colors are red, green and blue. Primary colors may be combined to make white light.

31. Complimentary colors 2 colors that combine to form white light.

32. Primary colors of light together form white light. But primary pigments together make black. This is because they absorb all colors.

33. Bye-bye!