state gov RSMSSB Grade 4 (Group D) Mock Test Series 2025 Physics Optics Refraction and Reflection

The correct form of Snell’s law when a ray of light is travelling from medium with refractive index n₁ to medium with refractive index n₂ is:

1

Sin i/sin r = n₁/n₂

2

Sin r = n₁/n₂

3

Sin i = n₂/n₁

4

Sin i/sin r = n₂/n₁

5

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