Question

The speed of light in an unknown medium is measured to be 2×10⁵m/s.what is the absolute refractive index of the medium if the speed of light in vacuum 3×10⁸m/s?

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Answer 1

Answer:

The refraction index, n, of a transparent medium is defined as the ratio of speed of light in vacuum to the speed of light in that medium. The formula is n= vc .

where the speed of light c=3×10 8

m/s and v is the speed of light in the desired medium which is given as v=2.4×10

8m/s.

Therefore, n= 2.4×10 8 m/s

3×10 8m/s =1.25.

Hence, the refractive index of the transparent medium is 1.25.

Explanation:

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Answer 2

Answer:

Explanation:

$refractive \: index \: of \: glass = \\ \frac{speed \: \: in \: \: vacuum}{ speed \: \: in \: \: glass} = \frac{2 \times {10}^{5} }{3 \times {10}^{8} } \\ \\ \frac{200000}{300000000} = \frac{1}{1500}$