How it works
Use transparent medium phase index with the units stated beside the fields. This form solves for phase refractive index; enter the known quantities in Phase speed in the medium.
Inputs and units
| Input | Example value | What to enter |
|---|---|---|
| Phase speed in the medium | 112,422,171.75 m/s | Formula symbol: v. Required unit: m/s. Must be greater than zero. |
Worked example
Show example inputs and results
This example is generated by the same calculation engine using the starting values in the form. Your own inputs produce your own result.
- Phase speed in the medium
- 112,422,171.75 m/s
Complete example results
- Phase refractive index
- 2.66666667
Reading the result
The result solves for phase refractive index from the entered quantities. Check the result unit and the formula conditions before using it.
Questions and answers
Can I use the example values for my own calculation?
The example values illustrate the calculation. Replace every input with your own information, especially dates, rates and the selected operation.
When can I use the phase refractive index result?
This model uses positive magnitudes. This classical transparent-medium branch uses phase speed no greater than c = 299792458 m/s and n at least 1. Group velocity, absorbing media and anomalous dispersion are excluded.
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method sources: openstax.org · nist.gov