in young's double slit experiment the slits are 0.2 mm apart and the screen is 1.5 m away it is observed that the distance between the central bright fringe and fourth dark fringe is 1.8 cm calculate the wavelength of the light used Share with your friends Share 8 Ujjval Chauhan answered this Dear student, Given, d= 0.2 mmD=1.5 mn= 4Distanc between the central bright and nth dark fring = n-12Dλd⇒1.8×10-2=4-12×1.5×λ0.2×10-3On solving we get,λ=6.85×10-7m Regards 23 View Full Answer
