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Wiggle wrench

Sunday 25 January 2015

GeoGebra is excellent at showing the maths behind relatively simple examples but once you start adding friction, air resistance, damping etc.... more

Magic moment

Saturday 24 January 2015

I was playing with GeoGebra to see if I could model single slit diffraction with a large number of wavelets in a narrow slit. Was a bit tricky... more

Fat films

Friday 23 January 2015

We're always talking about thin films but what about fat ones? At 5m thick, the film simulated in my latest GeoGebra adventure can hardly be... more

Quite big I suppose

Tuesday 20 January 2015

Nasa have just released a 1.5 billion pixel image of the Andromeda galaxy. Here is a 98,750 pixel version, not so impressive.... more

Full capacity

Tuesday 20 January 2015

Here is another one of those concepts that is hard to explain but all makes sense when you see the numbers changing. Easy to set up the equations... more

3D in GeoGebra

Tuesday 20 January 2015

When I made my Spinning stopper simulation in GeoGebra I faked the 3D effect by making the path elliptical, If I had bothered to upgrade to... more

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