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A soap bubble is essentially a very thin film of water (nn = 1.33) surrounded by...

A soap bubble is essentially a very thin film of water (nn = 1.33) surrounded by air. The colors that you see in soap bubbles are produced by interference.

What visible wavelengths of light are strongly reflected from a 388-nmnm-thick soap bubble?
Hint: Think about the reflection phase shifts at both boundaries.

What color would such a soap bubble appear to be?

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