waves

waves

1. sound

   • longitudinal waves
     • longitudinal waves are compression waves. air particles move closer and further apart.
   • Require Particles.
     • Sound will travel faster if the particles are closer together. so sound travels a long way in water compared to air.
     • sound waves require particles to travel through. Sound cannot travel through space because there are no air particles.

2. Electromagnetic spectrum

3. light

   • transverse waves.
     • Transverse waves are electromagnetic waves that can travel through space. A clear line of sight is required for light waves to be visible (they are blocked by opaque objects.