Bubbles are one of the most fun things to play with…but what colour are they?
Transparent? Clear? See-through?
How about if you could make your bubbles all the colours of the rainbow?
Well you can in this very simple experiment.
How to make rainbow bubbles
An empty clear bottle
Washing up liquid
An overcast day (works best)I
Fill the bottle about three-quarters full with water
Add a squirt (scientific measuring there) of washing up liquid
Quickly tip the bottle and pour the water out fast.
You will find that the bottle is left full of bubbles.
These will look clear and normal, to begin with but place the bottle on a windowsill and wait and watch over the next 30 seconds.
You will find that the bubbles will start to show signs of colour that will get stronger and stronger and that each bubble will look like it has been coloured like a rainbow!
Why can you see a rainbow in bubbles?
Visible Light from the sun is known as white light. It contains a range of colours, all with different wavelengths that, when together, form white light.
The colours of the rainbow are:
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Red, Orange, Yellow, Green, Blue, Indigo and violet
When white light from the sun shines through the film of the bubbles, the light is reflected and dispersed, splitting white light into its different wavelengths, revealing all the colours of the rainbow!
Last Updated on May 2, 2023 by Emma Vanstone