What you provide
What you provide
- Vacuum light speed expressed in m/s, using the same scenario as the other inputs
- Light speed in medium expressed in m/s, using the same scenario as the other inputs
PHYSICS / OPTICS
Refractive Index Calculator
Calculate absolute refractive index from vacuum and in-medium light speeds. Inspect the governing equation, substituted SI values, output, and model boundaries in one guided workspace.
- 01 Calculated in this tab
- 02 Values stay in this browser tab
- 03 Use boundary
Use boundary
Calculation path
Calculate absolute refractive index from vacuum and in-medium light speeds. The page evaluates the displayed equation from your supplied values and presents both symbolic and substituted KaTeX working so the arithmetic can be checked.
Calculation path
n = c/v
What you receive
What you receive
- Refractive index from the stated equation
- A symbolic formula plus substituted working with your values
- Visible assumptions, field guidance, and an authoritative learning reference
Use boundary
Choose the maximum decimal places shown. This does not increase source accuracy.
The medium is homogeneous for the wavelength and the entered speed is phase velocity.
Use internally consistent units and retain extra precision when carrying the result into another calculation.
Reviewed reference factors