1. Waves O 1.1 Waves

2. 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 90 o angle from the direction of the wave

3. Waves

4. Waves

5. 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

6. 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.

7. Waves