AP and TS EAMCET Engineering Model Paper 16

In Young double slit experiment, one slit is covered by a thin glass plate ofrefractive index 1.4 and other slit is covered by another glass plate of refractive index 1.7 having same thickness 't'. Due to presence of glass plates, central maximum is shifted by 5 fringes. If wavelength of light used is 480 nm, value of 't' is