Transverse & longitudinal

What is a wave?

A wave is a disturbance ( oscillation ) which transfers energy without transferring any matter, there are two types of wave:

TRANSVERSE

The oscillations of a transverse wave are perpendicular ( at a right angle ) to the direction in which waves transfer energy. (Light)

LONGITUDINAL

The oscillations of a longitudinal wave are parallel to the direction of transfer of energy. (Sound)

FEATURES OF A WAVE

Wavelength - the length of space between a point and the same point on the next wave

Trough - lowest point of a wave

Peak - highest point of a wave

Equilibrium - middle point of a wave

Amplitude - from the equilibrium to the peak or the trough, NOT the peak to the trough

EQUATIONS

Speed (m/s) = distance (m)/ time (s)

Frequency (Hz) = wave speed (m/s) / wavelength (m)

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Time period = 1 / frequency

Tics, prefer = one over four