what are molecular spectra? explain different types of molecular spectra.
Answers
What is Molecular Spectroscopy?
We know that when a matter is exposed to electromagnetic radiation, the electromagnetic spectrum of a series of wavelengths produces. Molecules absorb certain wavelengths to the higher electronic, vibrational, and rotational energy levels. So, the series of wavelengths, a molecule absorbs gives off a distinct molecular spectrum. A distinct molecular spectrum lies in the specific region of the electromagnetic spectrum.
Types of Molecular SpectraThe three types of molecular spectra are:
- Pure rotational spectra
- Vibrational rotational spectra
- Electronic band spectra
Pure Rotational Spectra
When a molecule absorbs a lower amount of energy that it makes a transition from one rotational level to another within the same vibrational level.
Vibrational Rotational Spectra
When a molecule absorbs sufficient energy that causes the transition of a molecule from one vibrational level to another within the same electronic level.
Electronic Band Spectra
When the exciting energy of the radiation is large enough to cause the transition of a molecule from one electronic level to another electronic level. This transition is accompanied by both rotational and vibrational level changes
Answer:
The three types of molecular spectra are: Pure rotational spectra. Vibrational rotational spectra. Electronic band spectra.