Reflection on the basis of Wave Theory Let t be the time in which the incident wave front reach from Q to in the same time the P’ reflected wave front starting from P reaches Q’ t QP’=PQ’=v In triangle and triangle PQP’ PQ’P’ Angle Angle 90 PQP’= PQ’P’= is the common side PP’ t QP’=PQ’=v Triangle PQP’ Triangle PQ’P’ = AngleQPP’ AngleQ’PP’ i = r Refraction on the basis of wave theory Let t be the time in which the incident wave front reach from Q to in the same time the P’ refracted wave front starting from P reaches such that and Q’ QP’=C1t PQ’=C2t In triangle In triangle PQP’ Hence from eq. (1) and (2) INTERFERENCE OF LIGHT INTERFERENCE OF LIGHT CONDITION FORCONSTRUCTIVE AND DESTRUCTIVE Let the waves from two coherent source of light be represented by __________________(1) ______________(2) According to principal of superposition, resultant displacement is given by y = y1 + y2 = a = 2 a cos cos (t + 2) The amplitude of the resultant displacement is 2a cos (/2) and therefore the intensity at that point will be
Reflection on the basis of Wave Theory Let t be the time in which the incident wave front reach from Q to P’ in the same time the reflected wave front starting from P reaches Q’ QP’=PQ’=v t In triangle PQP’ and triangle PQ’P’ Angle PQP’= Angle PQ’P’= 90 PP’ is the common side QP’=PQ’=v t Triangle PQP’ Triangle PQ’P’ AngleQPP’ = AngleQ’PP’ i = r Refraction on the basis of wave theory Let t be the time in which the incident wave front reach from Q to P’ in the same time the refracted wave front starting from P reaches Q’ such that QP’=C1t and PQ’=C2t In triangle PQP’ In triangle Hence from eq. (1) and (2) INTERFERENCE OF LIGHT CONDITION FORCONSTRUCTIVE AND DESTRUCTIVE INTERFERENCE OF LIGHT Let the waves from two coherent source of light be represented by __________________(1) ______________(2) According to principal of superposition, resultant displacement is given by y = y1 + y2 = a = 2 a cos cos (t + 2) The amplitude of the resultant displacement is 2a cos (/2) and therefore the intensity at that point will be
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