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14. waves and sound — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics14. waves and sound1 Mark
MCQ
There is a destructive interference between the two waves of wavelength $\lambda$ coming from two different paths at a point. To get maximum sound or constructive interference at that point, the path of one wave is to be increased by
  • A
    $\frac{\lambda }{4}$
  • ✓
    $\frac{\lambda }{2}$
  • C
    $\frac{{3\lambda }}{4}$
  • D
    $\lambda $
✓

Answer

Correct option: B.
$\frac{\lambda }{2}$
b
(b)With path difference $\frac{\lambda }{2}$, waves are out of phase at the point of observation.

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