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Q. In sine wave, minimum distance between 2 particles always having same speed is

MHT CETMHT CET 2011Electromagnetic Waves

Solution:

Sine wave
Particle velocity $v_p = \frac{dy}{dt} = $ slope of wave at that point.
At slope at A and B is zero. Hence there velocity at A and B will be same. Distance between A and B is $\frac{\lambda}{2}.$

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