The refractive index of glass with respect to air is and refractive index of water with respect to air is . What will be the refractive index of water with respect to glass?

Refractive index of air, μair = 1;

Given;

Refractive index of water w.r.t air, aμw ;

Refractive index of glass w.r.t air, aμg ;

Refractive index of water w.r.t glass = gμw = =

⇒ gμw =

∴ Refractive index of water w.r.t glass is .