Question

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Show that refractive index of the medium 2 with respect to medium 1 is equal to the ratio of the refractive index of the medium 2 to that of the medium 1.​

Answer 1

Answer:

Light - Reflection and Refraction. Show that the relative refractive index of medium 2 with respect to medium 1 can be expressed as the ratio of their absolute refractive indices. v1 and v2 be the speeds of light in the two media. A concave lens of focal length 15 cm forms an image 10 cm from the lens.

Answer 2

Answer:

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The refractive index is a relative value of speed of light in the given pair of media. Thus, to calculate the refractive Index the speed of light in two media is taken. Above expression gives the refractive index of medium 2 with respect to medium 1. This is generally denoted by n21.

Refractive indices less than 1 can occur and if the phase velocity of the light in the medium is faster than the speed of light. This often occurs close to the absorbance resonances of the material....

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