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Points from Foregoing Letters

    Naturevolume 135page235 (1935) | Download Citation

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    THE origin of the light of the aurora and of the night sky has been much debated. Prof. J. Kaplan states that he has succeeded in obtaining in the laboratory the green line λ5577, identical with that present both in the aurora and the light of the night sky. This he has done by means of a rapidly interrupted electrical discharge through nitrogen gas containing 1 per cent oxygen. The light emitted contained also other bands (Vegard-Kaplan system) which probably occur in the night sky.

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    https://doi.org/10.1038/135235b0

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