Two wave sources are oscillating in phase . Each source produces a wave of wavelength lemda . The two waves from the sources meet at point X with a phase difference of 90° . What is a possible difference in the distances from the two wave sources to point X ?
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The 2 sources are in phase.
A distance equal to the wavelength corresponds to a phase difference of 360° (that is they are in phase – or phase difference = 0°).
360° - - - > λ
1° - - - > λ / 360
90° - - - > (λ / 360) × 90 = λ / 4
So, a phase difference of 90° corresponds to a distance equal to λ / 4.
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