Waves (Yr 9)

Equation: Wave Speed, Frequency and Wavelength

Wave speed (m/s) = Frequency (Hz) x Wavelength (m). v = f x λ

Transverse Waves

Oscillations which are perpendicular to the direction of energy transfer. E.g. Light

Longitudinal Waves

Oscillations which are parallel to the direction of energy transfer. E.g. Sound.

Definition: Wavelength (m)

Distance from one point on the wave to the same point on the next wave.

Definition: Frequency (Hz)

The number of complete waves that pass through a permanent point per second.

Definition: Amplitude (m)

The distance from the equilibrium to the crest or the trough.

Definition: Time Period (s)

The time taken for one complete wave to pass.

Definition: Wave Front

The approaching crest of a wave.

Definition: Wave

Transfers energy or info. without transferring matter. All waves can be reflected and refracted.

Doppler effect

The change in the frequency of a wave in relation to an observer who is moving relative to the source of the wave.