Question: Why does the color change if you view the same bubble or gasoline layer at a different angle? Light reaching the eye from different parts

Why does the color change if you view the same bubble or gasoline layer at a different angle?
Light reaching the eye from different parts of the surface is reflected at different angles and traverses different thicknesses.
Diffraction occurs on the surface of the substance, due to which iridescence occurs.
The film of these substances has an uneven thickness, and therefore the light disperses in different ways.
These substances are made up of several different components with different indices of refraction, so light in a substance is refracted in different ways.
Why does the color change if you view the same

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