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Progress is impossible without change; and those who cannot change their minds cannot change anything. ..."George Bernard Shaw(1865-1950, Irish dramatist, essayist and critic, Nobel Prize for Literature 1925)"
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Author Topic: Light in hot water  (Read 5616 times)
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BrainstormUK
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on: August 24, 2009, 08:44:10 pm » posted from:Dublin,Dublin,Ireland

Everyday I warm my mug up at work with hot water before making tea in it. I notice that as I look in that there are 'lines' slowly swirling around disappearing and new ones appearing... What is going on? You do need to try this to see what I'm talking about, but I'd really like to know what's happening - after all it's only water!

One possibility is that the lines are interfaces in temperature differences (and so density differences) which then give a difference is refractive index so light falling on the interface is reflected differently to other areas and so they show up as lines. Huh

Any ideas most welcome
Cheers
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Progress is impossible without change; and those who cannot change their minds cannot change anything. ..."George Bernard Shaw(1865-1950, Irish dramatist, essayist and critic, Nobel Prize for Literature 1925)"
 
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