Missing lines in a continuous spectrum reveal

a)	Defects of the observing instrument
b)	Absence of some elements in the light source
c)	Presence in the light source of hot vapours of some elements
d)	Presence of cool vapours of some elements around the light source

Question ID - 152501 | SaraNextGen Top Answer

Missing lines in a continuous spectrum reveal

a)	Defects of the observing instrument
b)	Absence of some elements in the light source
c)	Presence in the light source of hot vapours of some elements
d)	Presence of cool vapours of some elements around the light source