Question
Physics Question on band theory of solids
Mercury vapour lamp gives
A
continuous spectrum
B
line spectrum
C
band spectrum
D
absorption spectrum
Answer
line spectrum
Explanation
Solution
When electric discharge is passed through mercury vapour lamp, eight to ten lines from red to violet are seen in its spectrum. In some line spectra there are only a few lines, while in many of them there are hundreds of them. Hence, mercury vapour lamp gives line spectra.