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Both calculators run independently — change the inputs on either side to compare results.
Relativity
Relativistic Doppler Shift Calculator
Calculates the observed frequency of light or sound when source and observer move at relativistic speeds. Use it when relative velocity is a significant fraction of the speed of light.
Fill in the required fields to see your result.
Relativity
Relativistic Escape Velocity Calculator
Calculates the escape velocity from a massive body using a relativistic correction for the Schwarzschild geometry. Useful for neutron stars, white dwarfs, and objects near black hole thresholds.
Fill in the required fields to see your result.
Key differences
| Relativistic Doppler Shift Calculator | Relativistic Escape Velocity Calculator | |
|---|---|---|
| Category | Relativity | Relativity |
| Inputs required | 3 | 2 |
| Result | Observed Frequency (Hz) | Escape Velocity (fraction of c) |
| What it does | Calculates the observed frequency of light or sound when source and observer move at relativistic speeds. Use it when relative velocity is a significant fraction of the speed of light. | Calculates the escape velocity from a massive body using a relativistic correction for the Schwarzschild geometry. Useful for neutron stars, white dwarfs, and objects near black hole thresholds. |