Astronomy Cast Ep. 504: Radar, Lidar, and Sonar

By susie - November 5, 2018 at 9:07 AM UTC | Physics

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To really study something, you want to reach out and touch it. But what can you do if you're separated by a huge distance? You reach out with electromagnetic or sound waves and watch how they bounce back. Thanks to radar, sonar and lidar.

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