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compression: pushing force.

Rarefaction:pulling force

ripple tank: a large glass- bottomed tank of water that is used to study wave in two dimensions.

reflection: change in direction of a wavefront at an interface between two different media so the wavefront returns into the medium from which it was origination.

Types of Waves

*wavefront:continuous line / surface including all the pint in space reached by a wave or vibration at the same instant as it travels through a medium

Transverse Wave: displacement of the medium is perpendicular to the direction of propagation of the wave e.g)ripple on a pond, wave on a string

refraction: the bending of a wave when it enters a medium where its speed is different.

diffraction: spreading of wave s around obstacels

electromagnetic wave

Longitudinal Wave: displacement of the medium is parallel to the propagation of the wave.

e.g) sound waves in air

Electromagnetic waves: waves that are capable of traveling through vacuum.

*vacuum: region with a gaseous pressure much less than atmospheric pressure.

Waves and Sound

Detail 4

Wavelength:distance over which the wave repeats.

amplitude:: maximum of extent.

peak: highest point of the wave

trough: lowest point of the wave

period: time required for one complete cycle of vibration to pass a givenpoin.

oscillation: vibration occcured when a system is disturbed fom a position of stable equilibrium

frequency: number of waves that pass a fixed point in a unit.

*unit: Hertz

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