The Doppler effect is a physical phenomenon that changes the frequency of waves perceived by an observer as a function of the movement of the source. The Doppler radar uses this characteristic to evaluate the direction in which a cloud is moving. If the frequency received is higher than the frequency emitted, the target is getting closer to the antenna. If it is lower, the target is moving away. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Science Source / QA International |
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