(a) State the laws of refraction of light. Explain the term absolute refractive index of a medium and write an expression to relate it with the speed of light in vacuum.
(b) The absolute refractive indices of two media 'A' and 'B' are 2.0 and 1.5 respectively. If the speed of light in medium 'B' is 2 x 10 raised to 8 m/s, calculate the speed of light in (i) vacuum (ii) medium 'A'
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) The incident ray, the refracted ray and the normal to the interface of two media at the point of incidence all lie in the same plane. ... Refractive index of a medium with respect to the vacuum is known as the absolute refractive index. c is the speed of light in vacuum and c is the speed of light in medium B.
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