define absolute refractive index of a medium light enters from air to water having refractive index 4/3 find the absolute refractive index of a medium
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define absolute refractive index of a medium light enters from air to water having refractive index 4/3 find the absolute refractive index of a medium
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n21 = n2 / n1.
so absolute refractive index of medim ,
= n medium / n air
= 4/3
Answer:
When light travels from air to another transparent medium 'm' , the refractive index of m with respect to air is called the absolute refractive index of medium 'm' .
μ = Speed of light in air/speed of light in medium
=> 4/3 = 3 * 10^8/ speed of light in water
=> Speed of light in water = 3 * 10^8/1.3
=> 2.30 * 10^8 m/s