Question

Light enters from air to a medium X. Its speed in medium X becomes 1.5 x 108

ms-1

. Find the refractive index of medium X.​

Answer 1

Explanation:

According to Snell's Law,

Refractive index of a medium X

$= > \frac{c}{v} \: where \: c \: speed \: of \: light \: in \: air \: and \: v \\ is \: speed \:of \: light \: in \: medium \: x \:$

$so \: refractive \: index \: x = \frac{3 \times 10 {}^{8} }{1.5 \times 10 {}^{8} } = 2$