What are the approximate temperatures and depths of x-ray, visible, magnetograms, and H-alpha images?
This answer courtesy of Loren W. Acton, Montana State University.
================================================================ Image Temperature Heights above where you see with your naked eye ================================================================ visible 5700K h = 0 km; the solar "surface" magnetograms 5300K h = a few hundred km above the solar "surface" H-alpha 10,000K h = 1000 - 10,000 km above the solar "surface" X-ray 1,000,000K h = 1000 - 1,000,000 km above the solar to 5,000,000K "surface" Thanks to Dick Canfield who helped me with the lower levels.
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Special Thanks to L. Acton.