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.
Concept: Principle of Superposition of Waves
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 ______.
Concept: Speed of Wave Motion