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Q: What is the unit of refractive index? अपवर्तनांक का मात्रक क्या है–
  • A. m⁻¹
  • B. Dioptre/डायोप्टर
  • C. No unit/कोई मात्रक नहीं
  • D. m/s
Correct Answer: Option C -
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Explanations:

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