The refractive index of diamond with respect to glass is 1.6 and absolute the refractive index of glass is 1.5. Find the absolute refractive index of diamond.
Absolute refractive index of glass, ng=cvg
where, c = speed of light in air
vg = speed of light in glass
Absolute refractive index of diamond, nd=cvd
vd = speed of light in diamond
Refractive index of diamond with respect to glass is given by, ndg=ndng=1.6
⇒ nd=ndg×ng=1.6×1.5=2.4
Therefore, the absolute refractive index of diamond is 2.4.