Bits and pieces by Lois

Watery gifts

In most shopping malls, garden centres, parks etc where there are ponds or running water it often seems people are encouraged to throw a coin in which will be collected later for charity. I’ve noticed all sorts of other watery places, out in the middle of nowhere sometimes, where people do the same thing… this must […]

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Bits and pieces by Lois

Wavefront direction change

Apparently, reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated… I didn’t know that, and I’m not sure I understand it now that I do know it!! Maybe if I hadn’t given up science in the […]

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