School Tie-up | Wavelength of light used is (a) 4000 A o. If wavelength of incident light is 500 nm. Fringe width is defined as the distance between any two consecutive bright or dark fringes. Constructive interference occurs when waves interfere with each other crest-to-crest and the waves are exactly in phase with each other. This browser does not support the video element. If P1 is located at the centre of a bright fringe and P2 is located at a distance equal to a quarter of fringe width from P1, then find I1/I2. The experimental set up is shown in figure. For getting an idea of the type of questions asked, refer the  Previous Year Question Papers. Interference patterns due to these narrow sources may overlap each other. Similarly, when is an odd integral multiple of λ/2, the resultant fringes will be 180 0 out of phase, thus, forming a dark fringe. Refund Policy, Register and Get connected with IITian Physics faculty, Please choose a valid Distance of the nth bright fringe on the screen from the central maximum is given by the relation, x = n λ 1 (D/d), If third bright fringe. (a) Distance of the nth bright fringe on the screen from the central maximum is given by the relation, b) Let the nth bright fringe due to wavelength λ 2 and (n − 1) th bright fringe due to wavelength λ 1 coincide on the screen. of Derivatives, Application Know here complete details related to WB class 10 and 12 board exam 2021. Then: (b) Bright fringe will be brighter and dark fringe is darker. FAQ's | RD Sharma Solutions | of Integrals, Continuity Then