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The absolute refractive indices of glass …

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The absolute refractive indices of glass and water are 4/3 and 3/2, respectively. If the speed of light in glass is 2×10⁸m/s, calculate the speed of light in vaccum and water.

Posted by Snehal Panchal 8 years, 9 months ago

CBSE > Class 10 > Science

2 answers

Deepak Rexwal 6 years, 4 months ago

Shweta Gul

1Thank You

Shweta Gulati 8 years, 9 months ago

You have written the wrong question as refractive index of glass is 3/2 and water 4/3.

n_g = 3/2 and n_w = 4/3.

Absolute Refractive Index of a medium = Speed of light in vacuum/Speed of light in the medium

Speed of light in glass = 2 x 10⁸ m/s
Speed of Light in Vacuum = (3/2) x 2 x 10⁸ m/s = 3 x 10⁸ m/s

Speed of light in water = (3 x 10⁸m/s)/(4/3)
= 2.25 x 10⁸ m/s

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Posted by Pandey Ji 5 months, 3 weeks ago

CBSE > Class 10 > Science