Question

A thin oil film on a water surface appears coloured because of

Answer 1

Thin film interference occurs when light waves reflecting off the top and bottom surfaces of a thin film interfere with one another. This type of interference is the reason that thin films, such as oil or soap bubbles, form colorful patterns.

Answer 2

Answer:

anything is made up of different type and amounts molecules and compounds and these molecules and compounds absorb some type of wavelenghths while reflects others so, when light falls on thin layer of oil which is on the surface of water, absorb some wavelengths while reflect others. the apeared colors are the reflected rays(wavelengths).