Question

Atomic spectra is a line spectra. What does it mean?

Answer 1

When atoms are excited they emit light of certain wavelengths which correspond to different colors. The emitted light can be observed as a series of colored lines with dark spaces in between; this series of colored lines is called a line or atomic spectra. Each element produces a unique set of spectral lines.

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Answer 2

the emissions spectra of atom in case phase is on the other hand do not show a continuous spread of wavelength called line spectra or atomic spectra