• Question: i saw a raser thing in a shop once. it said on the packet that it doesn't cut your finger but i cuts packeging open. how does that work???

    Asked by hophappy to Mike, Pip, Tianfu, Tim, Tom on 3 Jul 2012.
    • Photo: Tim Stephens

      Tim Stephens answered on 3 Jul 2012:

      There are two possibilities:
      1) The laser is a colour that is only absorbed by the packaging, and not by your hand. If this is the case, then your hand can be in the beam without injury.
      2) The more likely one is that there’s some sort of sensor that detects when your hand is in the beam and turns it off to stop you from being injured.

    • Photo: Tom Lister

      Tom Lister answered on 3 Jul 2012:

      Interesting story. Where did you see the laser?

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