Candles at Christmas Revisited

Last week I gave a presentation at NPL on the physics of candles.

Above is a video of the slightly chaotic 32 minute presentation and if you are so inclined, you can download the PowerPoint file here.

I have spoken before about the wonderful physics of candles. But in revisiting the subject I learned that wax is basically not flammable and I felt obliged to mention this inconvenient truth!

The highlight of the talk is using a candle to power a thermo-electric generator, which in turn powers a USB port, which in turn powers a torch, which is brighter than the candle.

nikita-pic.jpg

Sadly, in the rush at the end of the talk I forgot to actually measure the brightness of the torch!

Next time!

And by the way, here is the slow-motion candle-relighting movie that is embedded in the PowerPoint but which doesn’t show up well in the lecture theatre view.

Thanks to Brian Madzima for the videography and editing, and Nikita Mezhnyakov for the photograph.

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One Response to “Candles at Christmas Revisited”

  1. edhui Says:

    I think I speak for your whole blog audience when I say:
    1. Best wishes for Christmas and the New Year.
    2. Please tell us about talks at NPL before they happen, not after, especially if there is a way to blag oneself in.
    Cheers
    Ed

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