The refractive index of dense flint glass is 1.65 and that of alcohol is 1.36 both with respect to air. What is the refractive index of flint glass with respect to alcohol?
Refractive index of flint glass = n1 = 1.65
Refractive index of alcohol = n2 = 1.36
Therefore, Refractive index of flint glass with respect to alcohol = n12=n1n2=1.651.36 = 1.21.