While many elemental spectral lines are visible, almost all molecular lines lie in the portion of the spectrum, since they are at much lower energy. while many elemental spectral lines are visible, almost all molecular lines lie in the portion of the spectrum, since they are at much lower energy. radio ultraviolet infrared x-ray visible light?

Infra and Red

Explanation:

While many elemental spectral lines are visible, almost all molecular lines lie in the infra portion of the spectrum, since they are at much lower energy. while many elemental spectral lines are visible, almost all molecular lines lie in the red portion of the spectrum, since they are at much lower energy.

need to see circuit to get time constant