What happens to the Doppler broadening of a spectral line when the r.m – McqOptions

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1.	What happens to the Doppler broadening of a spectral line when the r.m.s. speeds of the atoms in the light source increases?
A.	Spectral width does not change
B.	Spectral width increases
C.	Spectral width decreases
D.	Overall spectrum shifts without changing the width
Answer» C. Spectral width decreases

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