Question

What are stationary waves? Obtain the expression for the stationary wave in case of string fixed at its two ends.

Answer 1

When two progressive waves of same amplitude and wavelength travelling along a straight line in opposite directions superimpose on each other, stationary waves are formed.

Answer 2

Answer:

y=2Asinkxcosωt

Explanation:

The above solution by Anju is right just final step is missing,

y=2Asinkxcosωt

as K = 2π/λ and ω = 2π/T