First slide

Origin of spectra

Question

Line spectrum contains information about

Moderate

A

The atoms of the prism
B

The atoms of the source
C

The molecules of the source
D

The atoms as well as molecules of the source

Solution

In line spectrum, bright coloured lines are observed on a dark background. These are called spectral lines. Each spectral line has a definite wavelength. Line spectrum is obtained per gases and metallic vapours, when they are in the atomic state. It means that line spectrum is related with the atomic state of matter.

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