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MHT-CET : Physics Entrance Exam

MHT - CET : Physics - Wave Motion Glossary

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                     Wave Motion: A disturbance travelling through an elastic medium due to periodic vibrations of the particles of the medium, resulting in transfer of energy from one point to another.

                     Transverse Waves: Waves in which particles of the medium vibrate perpendicular to the direction of propagation of the wave are called transverse waves.

                     Longitudinal Waves: Waves in which particles of the medium vibrate parallel to the direction of propagation of the wave are called longitudinal waves.

                     Amplitude: The maximum displacement of a particle of the medium from its mean position.

                     Period: The time taken to travel the distance equal to the wavelength.

                     Frequency: The number of wavelengths propagated by the wave in one second.

                     Wavelength: Distance between two adjacent compressions or two crests in a wave.

                      

Velocity of a wave: Distance covered by the wave in one second. V = 

l

T

                      

                     Principle of Super Position of Waves: When two or more waves, travelling through a medium, arrive at a point simultaneously, each wave produces its own displacement at that point independently of the other waves. Hence, the resultant displacement at that point is the vector sum of the displacements due to each of the waves.

                     Beats: When two sound notes of the same amplitude but slightly different frequencies are sounded together, the resultant intensity of sound alternately increases and decreases. This rise and fall in the intensity of the sound is called beats.

                     Doppler Effect: The apparent change in the frequency of the sound due to the relative motion between the source of sound and the observer is called Doppler effect.

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