Relativistic Doppler Shift calculator
Wavelength shift for source moving along line of sight.
Category: Spectroscopy
Formula: β = v/c · λ = λ₀ · √((1+β)/(1-β))
Inputs
| Input | Parameter | Unit | Default |
|---|---|---|---|
| Rest λ₀ | lam0 | nm | 656.28 |
| Velocity v (receding +) | v | m/s | 30000 |
Result with the default inputs
- Observed λ: 656.3457 nm
- Δλ: 0.0657 nm
- Redshift z: 1.0007e-4
- β = v/c: 1.0007e-4
Open it with your own values: put each input in the address as a parameter, for example /calculators/relativistic-doppler-shift?lam0=656.28. A unit other than the listed one goes in <parameter>_unit.
Read more: Wikipedia: Relativistic Doppler effect