Wave Optics Important Questions for CBSE Class 12 Physics Interference of Light 1.Superposition Principle According to superposition principle at a particular point in the medium, the resultant displacement y produced by a number of waves is the vector sum of the displacements produced by each of the waves (y1, y 2 , y3 ,•••) i.e. y = y1+y2+y3 2.Coherent Sources of … [Read more...]