#### Question

The refractive index of glass for light going from air to glass is .

The refractive index for light going from glass to air will be:

(*a*) `1/3`

(*b*) `4/5`

(*c*) `4/6`

(*d*) `5/2`

#### Solution

4/6

Explanation:

Refractive index of material 2 with respect to material 1 is given by:

_{1}n_{2 =`"speed of light in medium 1"/"speed of light in medium 2"` }

_{By the same argument, refractive index of medium 1 with respect to medium 2 is given by: }

_{2n1 = `"speed of light in medium 2"/"speed of lighht in medium 1"`=1/1n2 }

_{1n2 is `3/2` therefore, 2n1 will be 1/ `3/2` }

_{Therefore, refractive index of light going from glass to air will be 4/6.}

Is there an error in this question or solution?

Solution The Refractive Indices of Four Media A, B, C and D Are 1.44, 1.52, 1.65 and 1.36 Respectively. When Light Travelling in Air is Incident in These Media at Equal Angles, the Angle of Refraction Concept: Refraction of Light - Refractive Index.