Question

The absolute R.I of flint glass is 1.66 and that of water is 1.33 what is R.I of flint glass with respect to water?

Answer 1

R.I. of flint glass with respect to water= Abs. R.I. of flint glass/ Abs. R.I. of water

                                                              =1.66/1.33    

                                                              ≈1.25