The standing wave in a medium is expressed as $y=0.2 \sin (0.8 x) \cos (3000 t) \,m$. The distance between any two consecutive points of minimum or maximum displacement is
  • A$\frac{\pi}{2} m$
  • B$\frac{\pi}{4} m$
  • C$\frac{\pi}{6} m$
  • D
    None of these
Medium
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