Question : When an atomic gas or vapour is excited at low pressure, by passing an electric current through it then
A. emission spectrum is observed
B. absorption spectrucm is observed
C. band spectrum is observed
D. both (b) and (c)
Answer:A
Question : When an atomic gas or vapour is excited at low pressure, by passing an electric current through it then
A. emission spectrum is observed B. absorption spectrucm is observed C. band spectrum is observed D. both (b) and (c)