refractive index of glass with respect to air is 3/2..refractive index of water with respect to air is 4/3..what is the refractive index of glass with respect to water?? is it 3/2 divided by4/3 or 4/3 divided by 3/2??

** let speed in glass be z,water be y and air be x**

**3/2 = x/z**

**z = 2x/3 **

**4/3 = x/y**

**y = 3x/4**

**RI of glass with respect to water is = 3x/4 * 3/2x = 9/8 = 1.125**