How can laser light be used in spectroscopy?

Laser light is used in spectroscopy primarily because it provides a highly monochromatic, coherent, and intense source of light. These characteristics are essential for facilitating precise measurements of the properties of materials.

In spectroscopy, lasers can be tuned to specific wavelengths, allowing scientists to study the interaction of light with matter at a very detailed level. The precision in wavelength enables the analysis of various material properties, such as absorption, emission, and scattering of light, which can provide insight into the molecular structure, composition, and concentration of substances.

Moreover, the coherence of laser light enhances the sensitivity of spectroscopic techniques, enabling the detection of even minor alterations in properties resulting from interactions with different materials. This precision and sensitivity make lasers an invaluable tool in various applications, such as chemical analysis, environmental monitoring, and biomedical diagnostics.