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abstraction > mathematical concept > number > quantity > radiation measurement > spectral feature > spectral line > hydrogen line > Brackett line

Brackett line
subject			fact

Brackett line	has lower energy level 4
	is a kind of spectral series line
	is a kind of hydrogen line
spectral series line	has series limit
hydrogen line	has species hydrogen (H I)
spectral line	has transition
	has equivalent width
spectral feature	has wavelength
	has width
	occurs in
radiation measurement	has unit radiation unit
number	has value

Kinds of Brackett line :

• Br alpha (2 facts)