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physical phenomena > process > physical process > motion > harmonic motion > wave

wave
subject			fact

wave	has propagation direction
	has definition A propagating pattern of disturbance.
	has definition Propagation of energy by means of coherent vibration.
	is a kind of motion
	is a kind of harmonic motion
harmonic motion	has amplitude
	has period
	has synonym periodic motion
physical process	has domain physics

Kinds of wave :

• longitudinal wave (1 kind, 5 facts) - A wave vibrating along the direction of propagation.
• standing wave (3 facts) (stationary wave) - A pattern of oscillations in space in which the regions of maximum displacement and of zero displacement (the nodes) remain fixed in position. This pattern is formed when two waves of the same amplitude and frequency move simultaneously through a medium in opposite directions.
• transverse wave (44 kinds, 139 facts) - Wave vibrating at right angles to the direction of propagation.