A double-slit is illuminated with monochromatic light in the airand it turns out that the first order minima occur at angles ∓35.09° relative to the reference line from the double slit to centralmax. If the double slit is lowered into a transparent liquid andilluminated with the same light, the first order minima occur atthe angles ± 19.36 °. Decide the refractive index of theliquid?
