anonymous
  • anonymous
why do soap and petrol give out the seven colours when they are exposed in sunlight
Physics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
due to refraction
anonymous
  • anonymous
chromatic dispersion takes place
anonymous
  • anonymous
but does it depend on the materialistic properties

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anonymous
  • anonymous
yes
anonymous
  • anonymous
its due to dispersion of light.. white light has 7 colours say VIBGYOR.. when white light passes through petrol or soap, different colours get dispersed.. since each colour has its own wavelength n phase velocity, it gets disperse at different angles.. so we can see different colours
anonymous
  • anonymous
This wikipedia article [ http://en.wikipedia.org/wiki/Soap_bubble#Interference_and_reflection ] says that it is due to interference - not refraction and dispersion.

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