If the refractive index of water for light going from water to air is 0.75, then the refractive index for light going from air to water will be :

Foundation

Physics Foundation

refraction from lens

Refraction and parallel slab

Question

If the refractive index of water for light going from water to air is 0.75, then the refractive index for light going from air to water will be :

1.53.

1.50.

1.45.

1.33.

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The refractive index from medium 1 to medium 2 (n₁₂) is the reciprocal of the refractive index from medium 2 to medium 1 (n₂₁). Given n_{water to air} = 0.75, the refractive index from air to water is its reciprocal.

Therefore, n_{air to water} = 1 / n_{water to air} = 1 / 0.75.

$\frac{1}{0.75} = 1.333...$

Final Answer: 1.33