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For a travelling harmonic wave , `y=2.0cos(10t-0.0080x+0.818)` where x and y are in cm and t is in sec. What is the phase difference between two points separated by (i) a distance of 0.5m (ii) time gap of 0.5s.

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The correct Answer is:
(i)-0.4 rad (ii) 5 rad
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