Line Spectrum of Gases.
Tungsten filament lamp (not clear in the photo due to the high brightness) emitting white light, mixture of all wavelengths, when seen through the grating glasses shows continuous spectrum VIBGYOR.
In the middle mercury vapour lamp is there which gives the line spectra, with few of the wavelengths.
In the top we have sodium vapour lamp, which gives the line spectra of almost just one wavelength. yellow, monochromatic 589.6 nm.
Line spectrum (sometimes also referred as finger prints of gases) which baffled scientists for a long time was later explained by Bohr's atomic model.
What is Continuous Spectrum and Line Spectrum?
What is Emission Spectrum and Absorption Spectrum?
Click on the gas name to change to Hydrogen, Helium, Neon, Mecury and Sodium Lines
Finger Prints of Gas