« Last post by evan_au on Yesterday at 23:40:48 »
Quote from: OP
EM field would interrupt & affect the hydrogen molecule?If you hit a hydrogen with a sufficiently energetic photon (in teh UV range of the spectrum), you can disrupt it.
Quote from: evan_au
You can measure these vibrations with infra-red spectroscopyCorrection: I found out today that a symmetric diatomic molecule like hydrogen or nitrogen does not show up in infra-red spectroscopy, as the molecule needs to have an overall electrical field in order to interact strongly with photons (electromagnetic radiation).
So asymmetric molecules like carbon monoxide (CO) or water (H2O) do show up in infra-red spectroscopy, but molecular hydrogen does not.
You can measure the vibration of symmetrical molecules like Hydrogen using Raman spectroscopy which measures photons bouncing off the molecule (this uses a laser to generate monochromatic photons, and measures the Doppler shift of the interacting photons).
I guess that's why astronomers have so much difficulty measuring the concentration of molecular hydrogen in interstellar space...