Question

calculate the absolute refractive index of water given that the speed of light in water is 2.25 into 10 raise to the power 8

Answer 1

refractive index is defined as the ratio of speed of light in the vacuum to the speed of light in the medium .
$n = \frac{c}{v}$
$n \: = \frac{3 \times {10}^{8}m {s}^{ - 1} }{2.25 \times {10}^{ 8}m {s}^{ - 1} } = 1.333$