Researchers in China have harnessed the power of the Doppler effect to achieve a breakthrough in submarine detection.
  • queermunist she/her
    7·
    2 days ago

    … isn’t that just how radar works? A radio emission is sent out, bounces off an object, and then detectors measure the difference?

    The fact that this works from the sky is definitely new, but I think all radar is light speed by definition.

      • queermunist she/her
        61·
        2 days ago

        I figured something cool was happening to allow them to use radar from the air. So it’s not even radar, it’s like, ELFdar.

        Really weird they went for the “lightspeed” angle tho

        • ☆ Yσɠƚԋσʂ ☆OP
          72·
          2 days ago

          for sure, I find most of the time science reporting actually makes it harder to understand what the tech does rather than explain it

          • lemmeout@lemm.ee
            41·
            2 days ago

            In the spirit of dumbing down the plot to make sure viewers don’t turn away, they end up making totally nonsensical (if not misleading) content.

            • ☆ Yσɠƚԋσʂ ☆OP
              42·
              2 days ago

              I suspect that a lot of the time people doing science reporting have a fairly tenuous grasp on the subject themselves as well.

        • halyk.the.red
          1·
          2 days ago

          RF is still RF, the only difference between what they’re shooting into the water to detect subs and what you’re shooting into your hot pockets is output power and frequency. It’s still radio detection and ranging, just at a frequency not typically used for it. Microwave frequencies are used for what one would consider to be typical radar applications, while extremely low frequency would be better suited for communications.

          • queermunist she/her
            1·
            2 days ago

            Infrared isn’t red, though. Seems like it’s worth making a distinction between different frequencies if the way it interacts with matter is different.