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A wave y = a sin (wt-kx) on a string mee...

A wave y = a sin (wt-kx) on a string meets with another wave producing a node at x = 0. The equation of the unknown wave is

A

y = a sin (wt+kx)

B

y = acos (kx-wt)

C

y = -a cos (kx-wt)

D

y = -a sin (kx+wt)

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The correct Answer is:
D
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