<u>Answer:</u> The refractive index of the unknown medium is 1.5
<u>Explanation:</u>
To calculate the refractive index of the medium, we use the equation:
where,
= refractive index of medium = ?
c = speed of light in air =
v = speed of light in medium =
Putting values in above equation, we get:
Hence, the refractive index of the unknown medium is 1.5