Particles don´t spread out, pass through each other, add or cancel... but waves do.
What quantities do we use to model waves? Sound and light are very different but are modelled in the same way.
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Properties and quantities
The kinetic energy of a particle travels with the particle, whereas the energy in a wave spreads out.
Quantities used to describe waves include:
- Wave speed
A wavefront propagates as if it were made of an infinite number of wavelets.
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Transfer of energy
When a ball hits the surface of a pond, it gives energy to the surface. This energy spreads out. All waves involve the transfer of energy.
Speed, frequency and wavelength are related by the formula:
Use quizzes to practise application of theory.