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Index of Refraction Calculator
Calculate the refractive index of a medium
Instructions: Enter the speed of light in the medium ($v$) or select a common material to compute its index of refraction ($n$).
Optical Parameters
Calculation Results
⚠️ For optics and physics education reference only. The speed of light in a medium cannot exceed the speed of light in a vacuum ($c \approx 3 \times 10^8$ m/s).