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JEE Main20209 Jan 2020Morning ShiftPhysicsWaves and SoundActual

Three harmonic waves having equal frequency v and same intensity I 0 , have phase angles 0 , π 4 and - π 4 respectively. When they are superimposed the intensity of the resultant wave is close to:

Options

  1. A5.8 I 0
  2. B0.2 I 0
  3. C3 I 0
  4. DI 0

Correct answer

A. 5.8 I 0

Step-by-step solution

A R = 2 + 1 A I R = 2 + 1 2 I 0 = 3 + 2 2 I 0 = 5.8 I 0

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