Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Colour of lather?

  1. Sep 13, 2011 #1
    Dear members,
    Soaps and Shampoos comes in various colours, but their lather always appear white. What is the reason for this phenomenon?
  2. jcsd
  3. Sep 14, 2011 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Think foam and light scattering. Note that salt and sugar are transparent, but also appear white when small particles are viewed [/i]en masse[/i].
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook