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Transverse Waves :: Discussion

6.	The displacement of particles in a string stretched in the x-direction is represented by y. Among the following expressions for y, those describing wave motion are?
	A.	coskxsinωt
	B.	k² ω²-ω² t²
	C.	cos² (kx+ωt)
	D.	cos² (k² x2-ω² t²)

	Answer: Option A


	Explanation:
	y= coskxsinωt is the only equation of standing wave. The conditions for a function of x and t to represent a wave is (∂² y)/∂x² = constant×(∂² y)/∂t² Only first expression satisfies this condition.



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Published by:Michael Daani

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