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A transverse wave of amplitude $0.5\, m$ and wavelength $1\, m$ and frequency $2\, Hz$ is propagating in a string in the negative $x-$direction. The expression for this wave is
  • A$y(x,\,t) = 0.5\sin (2\pi x - 4\pi t)$
  • B$y(x,\,t) = 0.5\cos (2\pi x + 4\pi t)$
  • C$y(x,\,t) = 0.5\sin (\pi x - 2\pi t)$
  • D$y(x,\,t) = 0.5\cos (2\pi x + 2\pi t)$
AIIMS 1980, Easy
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