The physics of waves

Challenge #26 in the Sevens series. Hosted by Dutch Newchurch.
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This is the second in the series: ‘Seven Scientific Theories’. Imagine you have been asked to provide one or two creative and inspirational illustrations for a textbook on the physics of waves. A Marshall stack turned up to 11 (sound waves)? The colours in a film of oil (light waves)? A rainbow (the wave theory of light)? The destruction of an earthquake (primary, secondary and surface waves)? Ripples as a stone falls into a pond? The collision of two black holes generating gravitational waves? (Ocean waves breaking will be disqualified.) (The whole series is here: https://www.dpreview.com/forums/thread/4236850 )
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Aurora Boralis ..Northan Lights
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Submitted: Saturday, 27th January, 2018 16:05 (GMT)
Taken: Monday, 27th September, 2010
Focal length: 24 mm
Shutter speed: 16/5 sec
Aperture: F1.4
ISO: 400
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