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MHT CET Physics question

PhysicsWavesMHT CET

Two sinusoidal waves with same wavelengths and amplitudes travel in opposite directions along a string with a speed . If the minimum time interval between two instants when the string is flat is 0.5 s, the wavelength of the waves is

Answer: (D)

Solution

The superposition forms a standing wave , which is flat whenever , i.e. every ; so

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Question ID VK-068655