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Two Angstrom Towards the Blue End

The blue-shift of deuterium relative to hydrogen can be calculated from standard theory. It can also be confirmed in laboratory experiments.

What should be noted is that the deuterium spectrum comes out at about 2 angstrom towards the blue end of the spectrum as compared to hydrogen.

Hydrogen emitting redder light than deuterium

Heavy isotopes emit bluer light than lighter ones

It follows from this that an increase in mass of atomic nuclei will shift the light spectrum of the affected matter towards the blue end of the spectrum.

Note that the exact energy levels of the electrons are determined by the size of the nucleus. This lends support to the bouncing electron model in that such a model provides a mechanism for the electron to be affected by the size as well as the charge of the nucleus.

A bigger nucleus will act as a bigger trampoline for the electrons, leading to more energetic bounces despite the fact that the charges involved are unchanged.

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