Question

The speed of light in vacuum is 3x10^8m/s and in glass is 1.97x10^8m/s. Find the refractive index of glass with respect to vacuum.​

Answer 1

Refer to the attachment

Answer 2

${\large{\underbrace{\mathbb{\pink{ ANSWER\: \:-: }}}}}$

We Know:

$\boxed{\boxed{\tt\pmb{\blue{μ = \frac{Speed \: of \: light \: in \: vaccum(air)}{Speed \: of \: light \: in \: a \: medium}}}}}$

$\rightarrowtail\ttμ = \frac{3 \times {10}^{8}}{1.97 \times {10}^{8}}$

$\rightarrowtail\tt{μ = \frac{3}{1.97}}$

$\rightarrowtail\tt{μ = 1.5}$

• Hence ,refractive index is 1.5.

$\rule{200pt}{5pt}$