Webster's dictionary defines a wave as "a disturbance or variation that transfers energy progressively from point to point in a medium and that may take.

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Presentation transcript:

Webster's dictionary defines a wave as "a disturbance or variation that transfers energy progressively from point to point in a medium and that may take the form of an elastic deformation or of a variation of pressure, electric or magnetic intensity, electric potential, or temperature."

Human wave © Dan Russell (2002)

In Longitudinal waves, the particles in a medium oscillate back and forth about their equilibrium positions but it is the disturbance which travels, not the individual particles in the medium. Longitudinal Wave © Dan Russell (2002)

In a transverse wave the particle displacement is perpendicular to the direction of wave propagation. The particles do not move along with the wave; they simply oscillate up and down about their individual equilibrium positions as the wave passes by. Transverse wave © Dan Russell (2002)

Water waves are an example of waves that involve a combination of both longitudinal and transverse motions. As a wave travels through the water, the particles travel in circles. Water Wave © Dan Russell (2002)

For a sinusoidal plane wave

To determine angular frequency  To determine wavelength

 (x,0)  (x,  t) SB

Time evolution of phase

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1. LECTURE NOTES FOR PHYSICS I SASTRY AND SARASWAT 2. THE PHYSICS OF VIBRATIONS AND WAVES AUTHOR: H.J. PAIN IIT KGP Central Library Class no PAI/P