See attachment.© BrainMass Inc. brainmass.com February 24, 2021, 2:31 pm ad1c9bdddf
n1 = 1.4
n2 = 1.7
no. of fringe shift m = 5
lembda = 480 nm
The solution involves a step-by-step calculation of thickness of a glass plate in a double-slit arrangement, given the indexes of refraction, central maximum, and wavelength of light.