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CBSE - X - Physics

Light enters from air to medium X.Its speed in medium Z becomes 1.5X10 raise to the power 8 m/S.Speed of light in air is 3X10 raise to the power 8 m/s.Find the refractive index of medium X?

Asked by nisha_vini29 2nd March 2017, 10:19 PM
Answered by Expert


Hi Nisha,

Refractive index is the ratio of speed of light in air/vacuum to that in a medium.

Therefore, the refractive index of the medium is

begin mathsize 12px style straight n equals straight c over straight v
therefore straight n equals fraction numerator 3 cross times 10 to the power of 8 over denominator 1.5 cross times 10 to the power of 8 end fraction equals 2 end style

Answered by Expert 3rd March 2017, 6:20 PM

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