Q71. The condition for constructive interference in case of diffraction grating is:Physics — Optics, Nature of Light and Optical Instruments — Question 71 of 155A. sin θ= dm λB. 2d sin θ = mλC. d sin θ = mλD. d sin θ = 2mλPractice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →