JEE Mains Model Paper 16

In a Youngs double slit both upper and lower slits are covered with glass plates of same thickness butrefractive indices 1.4 and 1.7 respectively. Interference pattern is observed with a light of wavelength5400 A°. It is found that the earlier position of central maxima is coming between 5th maxima and6th minima with an intensity of

3

4

of maximum intensity. Then the thickness of each glass plate is