Physics Optics Refraction and Reflection

వాక్యూమ్‌లో కాంతి వేగం ఎంత?

1
330 మీ/సె
2
3 × 10 5 మీ/సె
3
3 × 10 7 మీ/సె
4
3 × 10 8 మీ/సె
5

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