Question

Which of the following waves is used in Raman spectroscopy?
A. UV
B. $x$-rays
C. $\gamma$-rays
D. IR

Answer 1

Firstly, we need to know about spectroscopy, the Raman effect, and which waves are in Raman Spectroscopy. Raman Spectroscopy is based on the Raman effect. It uses the scattering of a beam. The Raman effect was named by the Indian Physicist Chandrasekhara Venkata Raman.

Complete step-by-step solution:
Spectrography is the study of the interaction of electromagnetic radiation with matter. Methods of spectroscopy are in phenomena of emission, absorption, scattering. Examples of Spectroscopy are the UV-Vis spectrophotometric screening method, Infrared spectroscopy, and mass spectroscopy.
Raman effect is defined as the change in the wavelength of a monochromatic beam when it is stroked by the molecules. when the beam strikes a molecule, it emerges in other directions other than the incident beam.
The incident beam is considered as consisting of the photon, when it strikes the molecules it is scattered in different directions. There is a frequency difference between scattered radiation and incident radiation.
Most of the scattered beams have the same frequency as the incident beam of radiation, it is Rayleigh scattering. some of the scattered beams have a frequency different from the incident beam, it is Raman scattering.
Infrared is used as a beam, which is used to strike the molecules on which the Raman scattering occurs.
Hence correct answer is an option (D) IR.

Note: Types of Raman Spectroscopy are surface-enhanced Raman Spectroscopy(SERS), Micro-Raman Spectroscopy, Resonance Raman Spectroscopy, and Non-linear Raman spectroscopic Techniques. Raman spectroscopy is in chemical analysis to characterize the organic compounds easily.