Question

what is spectrum explain briefly

Answer 1

a band of colours, as seen in a rainbow, produced by separation of the components of light by their different degrees of refraction according to wavelength.

Answer 2

SPECTRUM:-

The light that we see from sun or from an incandescent filament lamp is white light. A white light is composed of seven component colours namely violet,indigo,blue,green,yellow,orange and red (VIBGYOUR).

The splitting of white light into its component seven colours is known as dispersion. The array of seven colours extending from red at one end to violet at the other end similar to rainbow colours is called Spectrum.

Atoms,molecules or ions that have absorbed radiation (energy) are said to be excited. The radiation emitted by these substances form a spectrum. The light emitted by a sample of excited atoms is called “Atomic Spectrum”.

A sample of gas contains an enormous number of atoms. Although a single atom can be in only one excited state at a time,the collection of atoms contain all possible excited states. The light emitted as these atoms fall to lower energy states is responsible for the spectrum.


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