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abstraction > mathematical concept > number > quantity > radiation measurement > spectral feature > absorption edge > Helium discontinuity |
Helium discontinuity | ||||
subject | fact |
Helium discontinuity | is a kind of absorption edge | |
has species helium (He I) | ||
spectral feature | has wavelength | |
has width | ||
occurs in | ||
radiation measurement | has unit radiation unit | |
number | has value |