Q85. The condition for constructive interference of two coherent beams is that the path difference should be:Physics — Optics, Nature of Light and Optical Instruments — Question 85 of 155A. Integral multiple of λ /2B. Integral multiple of λC. Odd integral multiple of λ /2D. Even integral multiple of λPractice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →