What is Spectrum?

            “Results obtained on a screen by dispersing radiation of different wavelengths through different angles by a spectroscope” is called spectrum.

Types of Spectrum :

Spectrum is of two types:

Continuous Spectrum:

The spectrum in which different bands are not well separated by definite boundaries is called continuous spectrum.

e.g. sunlight spectrum, incandescent solid like glowing tungsten filament in bulb produce continuous spectrum. Continuous spectrum depends upon temperature of the object only and not on its chemical composition.                                                               

Line spectrum:

The spectrum in which different lines are well separated from one another by means of spaces between them is called line spectrum e.g. atomic spectrum is a line spectrum.

Types of Line Spectrum :

It is further of two types                                       

   (a) Line Emission Spectrum:

The spectrum produced by radiations emitted by an excited substance is called line emission spectrum.                                         

   (b) Line Absorption Spectrum:

The spectrum of radiations out of  which some are absorbed by un excited substance is called line absorption spectrum.     

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