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Q. The angle between particle velocity and wave velocity in a transverse wave is

MHT CETMHT CET 2008Electromagnetic Waves

Solution:

In a transverse wave the particles of the medium vibrate about their mean positions in a direction perpendicular to the direction of wave propagation.
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Here, the particle velocity is given by $ \frac{dy}{dt}$ and
wave velocity is given by $ \frac{dx}{dt}$.
Hence, the angle between particle velocity and wave velocity ma transverse wave is $ \frac{\pi}{2}$