Three immiscible liquids of densities d1 > d2 > d3 and refractive indices µ1 > µ2 > µ3 are put in a beaker. The height of each liquid column is h/3. A dot is made at the bottom of the beaker. For near-normal vision, find the apparent depth of the dot.
Apparent depth of the dot =3μ1h+3μ2h+3μ3h=3h[μ11+μ21+μ31]
