Question

Practice Problems 1 :
1. The velocity of light in air is 3 * 109 ms and in glass is 2 x 10 ms! Find the refractive index of glass.​

Answer 1

Explanation:

$refractive \: index \: of \: glass = \frac{velocity \: in \: air}{velocity \: in \: \: glass}$

= 3*10⁹/2*10⁹

= 1.5

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Answer 2

Answer:

Glass refractive index is defined as the ratio between the speed of light in the vacuum and the speed of light in the glass.

Refractive index of glass (ng) = Speed of light in vacuum/speed of light in the glass.

ng = (3 ×108)/ (2 ×108)

ng = 1.5

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