Question

A line emission spectrum consists of

• A. bright lines on a dark background
• B. dark lines on a bright background
• C. alternate dark and bright lines
• D. a dark patch followed by a coloured band

Answer 1

Answer: (A)

Line emission spectrum consists of bright lines on a dark background. The study of emission line spectra of a material can therefore serve as a type of 'fingerprint' for identification of the gas.