![]() Thus anĮmission spectrum, which is a photographic recording of the separated wavelengths is called as line spectrum. The light emitted by a sample of excited hydrogen atoms (or any other element) can be passed through a prism and separated into certain discrete wavelengths. The characteristic lines in atomic spectra can be used in chemical analysis to identify unknown atoms in the same way as fingerprints are used to identify peopleīoth of the Emission And absorption spectrum is described in below figure Such spectra are called line spectra or atomic spectraĮvery element has a unique line emission spectrum. The emission spectra of atoms in the gas phase, on the other hand, do not show a continuous spread of wavelength from red to violet, rather they emit light only at specific wavelengths with dark spaces between them. The spectrum of the visible light, is continuous as all wavelengths (red to violet) of the visible light are represented in the spectra. The study of emission or absorption spectra is referred as spectroscopy The wavelengths which are absorbed are missing and come as dark lines.Īn absorption spectrum is like the photographic negative of an emission spectrum The sample absorbs radiation of certain wavelengths. Sample gives up the absorbed energy, is recorded.Ībsorption spectrum is the spectrum obtained when radiation is passed through a sample of material. It is noticed when radiations emitted from source are passed through a prism & received on photographic plate.Įmission spectrum is produced by supplying energy to a sample by heating it or irradiating it and the wavelength (or frequency) of the radiation emitted, as the The spectrum of radiation emitted by a substance that has absorbed energy is called an emission spectrum. Hence, this spectrum known as continuous spectrum. ![]() ![]() These colors are so continuous that each of them merges into the next. When white light is analyzed by passing through prism, it splits into seven colors. VIBGYOR (V) = Shortest wavelength 400nm R = Longest wavelength 450 nm When white light is passed through prism, it splits into band of seven colors called spectrum. ![]()
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