1. WAVES

2. Waves transfer energy without transferring matter.

3. Longitudinal Wave (Compression Wave)
wave particles vibrate back
and forth along the path that
the wave travels.

4. Compressions = The close together part of the wave (regions of high density).

5. Rarefactions = The spread-out parts of a wave
(regions of low density).

6. Wavelength = the distance between successive rarefactions or successive compressions.

7. Longitudinal/Compression Wave Examples
Sound
Music
Earthquake (p-wave)
Compressed and stretched slinky

8. Transverse waves
wave particles vibrate in an up-and-down motion.

9. Picture of a Transverse Wave
Crest l
Wavelength A
A - Amplitude
Trough
Baseline

10. Wavelength (l)= Units - meters
Distance between adjacent crests in a transverse wave Distance a wave travels during one vibration
Units
- meters

11. Transverse Wave Description-
Frequency (f)- the number of vibrations per unit of time made by the vibrating source. Unit – 1/s = Hertz (Hz) Amplitude- Height of a wave, from the baseline to the crest or trough.

12. Transverse Wave Examples
Electromagnetic Waves
The Wave
Earthquake (s-wave)
Slinky (up down)

13. Wave interactive
animation.com/electricity_electromagnetism_interactive/oscilloscope_de scription_tutorial_sounds_frequency.htm

14. Chrome Music Lab

15. Electromagnetic Spectrum
Electromagnetic Spectrum --The type of radiation is based on the waves wavelength and only the wavelength.

17. Visible Light: Color

18. The Electromagnetic Spectrum
ROY G BIV = Visible Light in of decreasing wavelength
Maxwell - (c. 1864) light is an EM wave

19. Dispersion…
Color separates using a prism because different colors have different wavelengths.
Red light bends the least and purple light bends the most.

20. Colored lights combine to appear white.

21. Colored lights add to become white.
Why then do paints add
to become black?

22. Answer: paints are pigments.
Pigments are chemicals which are
capable of absorbing one or more frequency of white light.

23. Inverted Color or Negatives
Allows you to see the light being absorbed vs reflected.

24. Reflection= Light reflects when it bounces off the surface of a material

26. Refraction=
The Bending of light as it passes through a substance.
The shape of the lens determines how the light behaves.