Why the foam of sea is white?

Why the foam of sea is white?

PROF WAQAR HUSSAIN

          Sea foam is produced by the constant agitation of the sea water especially when it contains high amount of dissolved organic compound which acts as surfactant or foaming agent. When sea water is churned foaming agent, at top layer of sea, entraps air as bubble. When the current of sea-water flows, this foam is dragged the sea shore.

          Foam is made up of so many little bubbles, each acting as a prism, and refracting the sun’s rays into their primary colours. As there are so many prisms, the various rays are so interlaced and interwoven as to produce white light.