The refractive index of glass for light going from air to glass is $\frac{3}{2}$ . The refractive index for light going from glass to air will be:

(a) $\frac{1}{3}$
(b) $\frac{4}{5}$
(c) $\frac{4}{6}$
(d) $\frac{5}{2}$

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Solution

(c) 4/6

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

₁n₂ = $\frac{Speed of light in medium 1}{Speed of light in medium 2}$

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

₂n₁ = $\frac{Speed of light in medium 2}{Speed of light in medium 1}$ = 1/₁n₂

₁n₂_{is $\frac{3}{2}$ ;} therefore, ₂n₁_{will be} 1/ $\frac{3}{2}$ .
Therefore, refractive index of light going from glass to air will be 4/6.

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The refractive index of glass for light going from air to glass is 3/2. The refractive index for light going from glass to air will be:
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The refractive index of glass for light going from air to glass is 32. The refractive index for light going from glass to air will be: (a) 13 (b) 45 (c) 46 (d) 52

The refractive index of glass for light going from air to glass is $\frac{3}{2}$ . The refractive index for light going from glass to air will be:

(a) $\frac{1}{3}$
(b) $\frac{4}{5}$
(c) $\frac{4}{6}$
(d) $\frac{5}{2}$