Thin Film Interference

Definition

Thin film interference occurs when light waves reflecting off both surfaces of a thin film interfere with each other constructively or destructively. This interference creates colorful patterns or changes in brightness.

Related terms

Newton's Rings: Newton's rings are circular interference patterns formed between a convex lens and a flat glass surface due to thin film interference.

Anti-reflective Coating: An anti-reflective coating is a thin film applied to the surface of an optical material to reduce unwanted reflections and increase light transmission.

Soap Bubble: The colors observed on a soap bubble are a result of thin film interference caused by light waves reflecting off the inner and outer surfaces of the soap film.