Question

The absolute refractive index of Ruby is 1.7. Find the speed of light in
Ruby. The speed of light in vacuum is 3 x 10^8 m/s.​

Answer 1

$\mathfrak{ \huge{ \red{ \underline{ \underline{ANSWER}}}}}$

• Given :

=> refractive index of ruby = 1.7

=> velocity of light in vacuum = 3×10^8 m/s

• To Find :

=> velocity of light in ruby

• Formula :

=> relation between velocity of light in medium and refractive index of medium is given by

$\boxed{ \sf{ \pink{ \bold{ \mu = \frac{velocity of \: light \: in \: vacuum}{velocity \: of \: light \: in \: medium} }}}}$

• Calculation :

$\implies \sf \: velocity \: in \: ruby = \frac{3 \times {10}^{8} }{1.7} = 1.76 \times {10}^{8} \: \frac{m}{s} \\ \\ \boxed{ \sf{ \red{ \bold{velocity = 1.76 \times {10}^{8} \: \frac{m}{s} }}}}$