A soap bubble is held vertically to observe how light passes through it. It is approximately a thin film in the shape of a wedge, thinner at the top, and thicker at the bottom. If we hold it in air on a sunny day we will observe a rainbow-like pattern. What is the physics phenomenon responsible for the observation? Provide a simple illustration of what happens to light incident near the normal. State an equation responsible for what can happen to transmission or reflection at a particular wave- length.

A soap bubble is held vertically to observe how light passes through it. It is approximately a thin film in the shape of a wedge, thinner at the top, and thicker at the bottom. If we hold it in air on a sunny day we will observe a rainbow-like pattern. What is the physics phenomenon responsible for the observation? Provide a simple illustration of what happens to light incident near the normal. State an equation responsible for what can happen to transmission or reflection at a particular wave- length.

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