He I λ1083 nm triplet
It was like searching for a specific toy in a huge box, and not finding it.
Technical definition
The metastable triplet of helium lines at a wavelength of 1083 nanometers.
It was like searching for a specific toy in a huge box, and not finding it.
The metastable triplet of helium lines at a wavelength of 1083 nanometers.