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How to explore Gravitational Redshift 3D Explorer
Open the explorer and watch light redden as it climbs out of a gravity well, while a deep clock ticks slower than a high one.
- Open https://freetoolonline.com/space-3d/gravitational-redshift.html and wait for the scene.
- Read the facts panel: Pound-Rebka, the Sun, Sirius B, and GPS figures.
- Follow a photon packet up the wave and watch it shift from blue to red.
- Toggle the clocks to compare the slow deep clock with the fast high one, or hide the wave.
- Switch on stronger gravity to exaggerate the redshift and the clock gap.
Gravitational redshift key figures
| Measurement | Value |
|---|---|
| Pound-Rebka (1959, 22.5 m tower) | ~2.5e-15 shift |
| Sun's redshift | ~633 m/s (2 ppm) |
| Sirius B redshift | ~80 km/s |
| GPS clock rate | ~38 microseconds/day faster |
Next: the when guide or vs alternatives. Open the Gravitational Redshift 3D Explorer.
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