The Nature of Waves.

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Presentation transcript:

The Nature of Waves

Terms to Learn Wave: is any disturbance that transmits energy through matter or space. Transverse wave: a wave in which particles vibrate with an up-and-down motion. The particles in the medium move perpendicularly(at right angles) to the motion of the wave. Longitudinal wave: the particles of the medium vibrate back and forth along the path that the wave travels. The particles in the medium move parallel to the motion of the wave

TRANSVERSE WAVE Highest part of wave = crest Lowest part of wave = trough

LONGITUDINAL WAVE

WAVES CARRY ENERGY Energy can be carried away from its source by a wave, but the material through which the wave travels (i.e. water) does not move with the wave. Waves carry energy but not matter.

Terms to Learn Mechanical wave: are waves that require a medium. Electromagnetic wave: are waves that do not require a medium Medium: is a substance through which a wave can travel. It can be a liquid, a solid or a gas.

Mechanical Waves Sound waves Ocean waves Waves on guitar strings

ELECTROMAGNETIC WAVES (aka EM Waves) EM waves DO NOT NEED A MEDIUM TO TRAVEL THROUGH . An example of an electromagnetic wave is light.

ELECTROMAGNETIC WAVES Although electromagnetic waves do not need a medium to travel through, they can travel through a medium like air, glass and water. Electromagnetic waves travel fastest through empty space ( a vacuum).

Combination Waves A transverse wave and a longitudinal wave can combine to form a surface wave. Surface waves look like transverse waves, but the particles of the medium in a surface wave move in circles rather than up and down.