Teaching UP TGT Mock Test Series 2025 Physics Optics Refraction and Reflection

If speed of light in air is 3 × 10⁸ m/s, the speed of light in glass (with refractive index 1.5) would be

1

2 × 10⁸ m/s

2

4.5 × 10⁸ m/s

3

3 × 10⁸ m/s

4

1.5 × 10⁸ m/s

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