Caption: Colours in a soap bubble. The movement in the thin film is due to the interaction between gravity and buoyancy in the liquid. The colours are produced by the interference of light waves reflected from the upper and lower surfaces of the film. As the thickness of the film is of a similar magnitude to the wavelength of visible light (dozens to hundreds of nanometres), the interference patterns appear as bands of colour, related to the thickness of the film. Thicker walls cause interference at longer (redder) wavelengths, so appear bluer and greener. As the film thins through evaporation or other processes, the reflected light cancels out yellow then green then blue light, appearing blue, magenta and golden yellow, before becoming too thin to support itself, and popping.Research into film behaviour can lead to increased understanding of other events involving fluid dynamics, for instance the movements of cloud bands in the atmosphere of Jupiter.

Release details: Model release not required. Property release not required.

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Bubble film colours

K003/8402 Rights Managed

Downloadable master

Duration: 00:01:16

Frame size: 1920x1080

Frame rate: 25

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 1.7G


Capture format: Sony FS700

Codec: Apple ProRes 422

Interlaced: Yes

Please contact Science Photo Library if you require the original, or other formats.


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