Question

the absolute refractive indices of glass and water are 4 upon 3 and 3 upon 2 respectively.if the speed of light in glass is 2×10^8.determine the speed of light in
1.vaccum
2.water

Answer 1

HELLO DEAR,


$n_{w} = \frac{4}{3} \\ n _{g} = \frac{3}{2}$
ABSOLUTE REFRACTIVE INDEX OF A Medium


=>(SPEED OF LIGHT IN VACUUM) / (SPEED OF
LIGHT IN THE MEDIUM)

SPEED OF LIGHT IN GLASS
=>
$2 \times {10}^{8} \frac{m}{s}$
SPEED OF LIGHT IN VACUUM
=>
$\frac{3}{2} \times 2 \times {10}^{8} \frac{m}{s} \\ = > 3 \times {10}^{8} \frac{m}{s}$
SPEED OF LIGHT IN WATER

=>
$\frac{3 \times {10}^{8} }{ \frac{4}{3} } \\ = > 2.25 \times {10}^{8} \frac{m}{s}$
I HOPE ITS HELP YOU DEAR,
THANKS