Class 12 NEET Physics Optics Questions Part 1

In Young’s double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths λ1=12000Å and λ2=10000Å.At what minimum distance from the common central bright fringe on the screen 2 m from the sHt will a bright fringe from one interference pattern coincide with a bright fringe from the other ?