Science (English Medium) Class 11 - CBSE Important Questions for Physics

Light waves each of amplitude "a" and frequency "ω", emanating from two coherent light sources superpose at a point. If the displacements due to these waves are given by y₁ = a cos ωt and y₂ = a cos(ωt + ϕ) where ϕ is the phase difference between the two, obtain the expression for the resultant intensity at the point.

Choose the correct option:

A standing wave is produced on a string clamped at one end and free at the other. The length of the string ______.