as we know the hydrogen atom consists of a core ( one notron and one proton) glued together by nuclear force and an rotating electron. the region with maximized probability of electron rotation is very far from the core, 10000 times of the radius of the core. as we know not excited atoms will not radiate, but any excitation will transfer the electron to a higher orbit and during the return-back, the atom will radiate.
the question is: for not excited electron, is there any electromagnetic radiation due to dipole-effect of atom, as the core with positive charge and rotating electron as negative charge?
Thank you
Understanding the concept of ortho- and para-hydrogen may help answer your question:
The hydrogen molecule (H2) has two different nuclear spin isomers, namely: ortho-hydrogen (i.e., same direction pair) and para-hydrogen (i.e., opposite direction pair). Both ortho- and para-hydrogen exhibit the same chemical properties but their physical properties any differ. The abundance of ortho:para in gaseous hydrogen at room temperature is roughly 3:1. When gaseous H2 is cooled to liquid phase, most hydrogen molecules convert to para-hydrogen. However, a portion of the ortho-hydrogen also becomes a liquid, and the ortho- to para- isomer conversion in the liquid phase after an extended period of time may generate heat in the form of electromagnetic radiation.
Hope this helps.
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