Question

. The speed of light in a transparent medium is 1.8 x 10 m/s. Find the refractive index of that medium.​

Answer 1

$refractive \: index= \frac{c}{v}$

$= \frac{3 \times {10}^{8} \: m {s}^{ - 1} }{1.8 \times 10 \: m {s}^{ - 1} }$

$= \frac{30}{18} \times {10}^{7}$

$= \frac{5}{3} \times {10}^{7}$

$= 1.67 \times {10}^{7}$