WAVES.

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Presentation transcript:

WAVES

WHAT IS A WAVE?

A WAVE IS… Any disturbance in a solid, liquid, or gas that transmits energy through matter or empty space.

Mechanical Waves Electromagnetic Waves Need a medium to travel through EXAMPLES: (Transverse waves and Longitudinal waves) ocean waves,Seismic waves, sound waves Energy transfer without a medium EXAMPLES: Light waves, microwaves, X rays Medium – substance through which a wave can travel. A medium can be solid, liquid, or gas.

TRANSVERSE WAVES Description: Wave in which the particles of the medium move perpendicularly to the direction the wave is traveling. http://www.acs.psu.edu/drussell/Demos/waves/wavemotion.html

PARTS OF A TRANSVERSE WAVES Crest – highest point of a transverse wave Trough – lowest point between each crest Crest Trough

crest 1 wavelength 1 wavelength Wavelength is: trough The distance from one crest of a wave to the next crest, or from one trough to the next trough

1 2 3 3 seconds Frequency is: The number of full wavelengths that pass a point at a given time interval Frequency = # of waves period

Amplitude Amplitude is the greatest distance between the resting point of a particle and it’s displacement (i.e.—the top of the crest or trough). The larger the amplitude, the taller the wave. amplitude

Wave Speed is: Wave speed is the speed at which a wave travels. Wave speed= wavelength x frequency When the frequency increases, the wave speed increases. When the frequency decreases, the wave speed decreases.

Human Wave Activity High Frequency, Low Amplitude Low Frequency, Low Amplitude Low Frequency, High Amplitude High Frequency, High Amplitude Which one requires (has) the highest energy?