# Waves

## Topic Summary

Topic Summary

- The properties of
**transverse**and**longitudinal**Waves - The
**properties**of**Electromagnetic waves** **Applications**of Electromagnetic waves

### Transverse and Longitudinal waves

Transverse and Longitudinal waves

**Transverse waves:** Particles move perpendicular to direction of motion of wave

*Example: Water waves*

**Longitudinal waves: **Particles move along direction of motion of wave

*Example: Sound waves*

### The Electromagnetic Spectrum

The Electromagnetic Spectrum

## Observing properties of waves in a ripple tank (Required Practical)

Observing properties of waves in a ripple tank (Required Practical)

Waves in a fluid can be observed using a ripple tank.

**There are various ways that this can be done:**

- The
**frequency**of a wave can be found by counting the number of waves that pass a point every second - The
**wave speed**could be calculated by timing how long it takes a wave to travel a fixed distance. - The
**wavelength**can either be observed by using a metre rule or could be calculated once the wave speed and frequency is known.

**Improving quality of results:**

- Measure the wavelength of 10 waves and then divide length by 10
- Measure the time taken for 10 waves to pass a fixed point and divide by 10
- Take repeat measurements
- Ensure the lab is darkened so that wave fronts can be observed more clearly