Question

Light enters from air into a medium X .If the speed of light through medium X is 2x10^8m/s then calculate the refractive index of that medium.

Answer 1

Answer:

1.5

Explanation:

Speed of light in air = 3 X 10⁸ m/s

Speed of light in medium X = 2 X 10⁸ m/s

Refractive index =

$Speed air/speed x = 3/2 = 1.5$

Answer 2

Answer:

According to Snell's Law,

Refractive index of a medium X=

v

c

where c is speed of light in air and v is speed of light in medium X.

So, Refractive Index of X=

1.5×10 8

2×10 8

=2

Answer

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