Three waves of equal frequency having amplitudes 10 mm , 4 mm , and 7 mm arrive at a given point with a successive phase difference of π 2 , the amplitude of the resulting wave in mm is given by

Question

Three waves of equal frequency having amplitudes 10 mm , 4 mm , and 7 mm arrive at a given point with a successive phase difference of π 2 , the amplitude of the resulting wave in mm is given by, 7, 6, 5, 4

MARKS App · Accepted Answer

As phase difference between waves of amplitudes 10 m m and 7 m m is π , therefore, their resultant amplitude = 10 - 7 = 3 m m . Now amplitudes 3 m m and 4 m m have a phase difference = π 2 . ∴ Resultant amplitude = 3 2 + 4 2 = 5 m m

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