Physics Help Forum Why do we see colours in bubbles?

 Light and Optics Light and Optics Physics Help Forum

 Feb 22nd 2010, 02:19 PM #1 Junior Member   Join Date: Feb 2010 Location: UK Posts: 17 Why do we see colours in bubbles? Colours can be seen moving around in a blown soap bubble. Explain how these are formed and why they move. I'm guessing it is something to do with the thickness of the bubble and light being somehow split but i'm not too sure other than that.
Feb 23rd 2010, 04:12 AM   #2
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 Originally Posted by George321 Colours can be seen moving around in a blown soap bubble. Explain how these are formed and why they move. I'm guessing it is something to do with the thickness of the bubble and light being somehow split but i'm not too sure other than that.
The reeason is because there is what we call dipersion of white light into the 7 different colours i.e red, orange, yellow, green, blue, indigo and violet. So, when the bubbles is blown to the air , there is passage of light through the bubbles and the different colours are dispersed. That is what also happens for rainbow formation.

Last edited by yinka4physics; Feb 23rd 2010 at 04:15 AM.

 Jul 15th 2010, 05:53 AM #3 Banned   Join Date: Jul 2010 Posts: 3 Nice question,basically the main reason behind that is light waves ,the bubble to the right is full of color because light waves reflected off its thick walls reinforce one another. Last edited by businessone01; Jul 21st 2010 at 11:49 PM.
Jul 15th 2010, 06:11 AM   #4
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 Originally Posted by George321 Colours can be seen moving around in a blown soap bubble. Explain how these are formed and why they move. I'm guessing it is something to do with the thickness of the bubble and light being somehow split but i'm not too sure other than that.
Refer the interference due to a thin film.

 Tags bubbles, colour, colours, light, reflect, refraction, wavelength

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