• Question: Roughly how long does it take to set rope on fire using a magnify glass?

    Asked by kazgowers to Kirsty on 21 Jun 2012.
    • Photo: Kirsty Ross

      Kirsty Ross answered on 21 Jun 2012:


      It depends on how cloudy the sky is and how close you are to the equator. It would probably take a lot less time to do this in sub-Saharan Africa than in northern Scotland for example. Patience is a virtue in this case, as it could take several hours! Rope would probably take even longer.

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