Christian Doppler (1803-1853). Caricature of the Austrian physicist Christian Doppler riding a train and playing a trumpet. Doppler is famous for the Doppler effect,proposed in 1842. This states that a stationary observer listening to a sound source will hear the sound at a higher pitch if the source is approaching,and a lower pitch when receding,than when the source is still. He later discovered this effect with light waves; Doppler shift measurements are used in modern cosmology | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Brown, Gary |
Bildgröße: | 2550 px × 3507 px |
Modell-Rechte: | nicht erforderlich |
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