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abstraction > mathematical concept > number > quantity > radiation measurement > spectral feature > spectral line > ionized helium line > ionized helium Paschen line > He II Paschen alpha |
He II Paschen alpha comparison table |
Subject | is a kind of | has wavelength | is an instance of |
---|---|---|---|
ionized helium Paschen line | ionized helium line | ||
He II Paschen alpha | 4686 Å | ionized helium Paschen line |