Question

Explain
why electronic Spectra is broad? ​

Answer 1

Explanation:

Electronic transitions

Electronic transitionsThe main factors that cause broadening of the spectral line into an absorption band of a molecular solid are the distributions of vibrational and rotational energies of the molecules in the sample (and also those of their excited states).

Answer 2

Answer:

Spectrum is broaden by spontaneous emission. ... More the energy of transition greater the spontaneous emission occur. Electronic transition use higher energy whereas Vibrational/Rotational/NMR transitions use lower energy. Hence, electronic transitions are broader whereas NMR transitions are sharp