• Question: are ghosts real

    Asked by Ben&Jerry to Kathryn, Graeme, Chris, Anne, Agnes, Adam on 8 Nov 2018.
    • Photo: Anne Green

      Anne Green answered on 8 Nov 2018:


      I don’t think so.

    • Photo: Agnes Wojtusiak

      Agnes Wojtusiak answered on 9 Nov 2018:


      Yes – and I fight them all the time in the lab!!! 😉
      .
      What we, laser scientists, call “ghosts” are unwanted laser reflections! You know when you look at a window, and you can see your face very faintly? That’s a little bit of light reflecting from the glass. Well, it happens to lasers too, but when it’s a bit of super powerful laser light, then the “ghosts” can be quite DANGEROUS!!
      .
      I’m actually working on putting special patterns into glass to make it like the eye of a moth – so you could say, MOTHS HELP US FIGHT GHOSTS 😀

    • Photo: Kathryn Harriss

      Kathryn Harriss answered on 10 Nov 2018:


      No, I don’t think so. They would defy Thermal dynamics and so just cannot be real.

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