And one vendor was demonstrating a giant bubble wand.
Rather successfully I might add. Beautiful big colorful bubbles!
The colors are obvious (and an example of thin film interference). But there is more going on that does meet the eye. Right side up and upside down images are also visible in several of the bubbles.
There is some interesting physics going on here.
Of course, as with all things optical you can learn more here. Happy learning!
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