In a Young's double slit experiment , the interference fringes are obtained on screen `0.75` m apart
Channel: Doubtnut
Date: 2020-08-30

In a Young's double slit experiment , the interference fringes are obtained on screen `0.75` m apart . The third dark band is at a distance of `5.5` mm from the central fringes (i) Determine the wavelength of light used if the two slits are `0.15` mm apart , (ii) What will be the wavelength of light used if the entire apparatus is immersed in  a liquid of refractive index 4/3 ?