1. Waves
O 1.1 Waves

3. Waves
Waves – disturbances that carry energy through matter or space but don’t carry matter.
Mechanical waves – waves that require matter to carry the energy (sound, water)
Electromagnetic waves – waves that do not require matter to travel
Transverse waves – waves that travel in a single direction while the matter moves at a 90o angle from the direction of the wave

4. Waves

6. Waves

7. Waves
Transverse waves – light, water, microwaves, x-rays, and radio waves
Crest – the highest point of a transverse wave
Trough – the lowest point of a transverse wave

8. Waves
Compressional waves (longitudinal waves) – matter moves forward and backward in the same direction as the wave (sound, first wave in an earthquake)
Compression – where molecules in a wave are close together
Rarefaction – where molecules are far apart in a longitudinal wave.

9. Waves