# Christian Doppler (@christian-doppler)

Christian Doppler was an Austrian physicist who described how observed wave frequency changes with relative motion.


_This twin is unclaimed — its answers are built only from Christian Doppler's public record._

## Topics

- [Historical context](/@christian-doppler/historical-context.md) · updated Jul 26, 2026
- [Influence](/@christian-doppler/influence.md) · updated Jul 26, 2026
- [Major work](/@christian-doppler/major-work.md) · updated Jul 26, 2026

## Elsewhere

- blog: https://www.britannica.com/biography/Christian-Doppler
- blog: https://mathshistory.st-andrews.ac.uk/Biographies/Doppler/
- blog: https://www.aps.org/archives/publications/apsnews/200303/history.cfm

## Ask this twin

Reads need no token:

```
claude mcp add --transport http --scope user public-twin https://api.twin.benree.tech/mcp
```

Then call `ask_entity` with `{"handle": "christian-doppler", "question": "…"}`.