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The displacement y of a wave travelling in the x direction is given by y = (2 × 10-3 ) sin (300 t – 2x +\(\frac{π}{4}\)), where x and y are measured in metres and t in second. The speed of the wave is …… (a) 150 ms-1 (b) 300 ms-1 (c) 450 ms-1 (d) 600 ms-1 |
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Answer» (a) 150 ms-1 From standard equation of wave, Y = a sin (ωt – kx + ϕ) ω = 300 ; k = 2 Speed of wave, V = \(\frac{ω}{k}\) = \(\frac{300}{2}\) = 150 ms-1 |
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