Solar eclipse flash spectrum
Taken by Jerry Zhu on August 21, 2017 @
McBride, MO, USA
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Details:
DIY spectroscope made from diffraction grating glasses and an iPhone. Used it to capture the transition from the continuous spectrum of the photosphere in the partial phase to the "flash spectrum", i.e. discrete lines from the thin chromosphere. It lasted for about 10 seconds before the chromosphere was also covered by the moon. I marked the brightest spectral lines for your reference.
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