Caption: Rubidium-caesium spectroscopy, animation. The electromagnetic radiation emitted by excited atoms and ions of a chemical element or molecule produce a characteristic spectrum. Such spectra are used to identify chemical elements, both in the laboratory and in distant stars. Here, aqueous ions of caesium (Cs+, left) and rubidium (Rb+, right) are producing characteristic purple-blue and red colours in a flame test, with the resulting emission spectra also shown. This was the method used by Bunsen and Kirchhoff to discover the elements rubidium (1861) and caesium (1860) using spectroscopy.

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Keywords: 1800s, 1860, 1861, 19th century, animated, animation, black background, bunsen, bunsen burner, bunsen flame, caesium, chemical, chemistry, color, colors, colour, colours, cs, cs+, discovery, duo, electromagnetic radiation, element, elemental, elements, excited, experiment, flame test, graphic, historical, history, illlustration, kirchhoff, line, no-one, nobody, pair, purple-blue colour, rb, rb+red colour, rubidium, spectra, spectral, spectral lines, spectroscopy, spectrum, test tube, two

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Rubidium-caesium spectroscopy, animation

K005/5337 Rights Managed

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Duration: 00:00:14.14

Frame size: 1920x1080

Frame rate: 24

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

File size: 103.3M


Capture format: QuickTime Animation

Codec: Photo - JPEG

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