Ultraviolet – visible spectroscopy or ultraviolet-visible spectrophotometry refers to absorption spectroscopy or reflectance spectroscopy in the ultraviolet-visible spectral region. This means it uses light in the visible and adjacent ranges. The absorption or reflectance in the visible range directly affects the perceived color of the . Applications ‎ Practical considerations ‎ Ultraviolet-visible.

Although we see sunlight (or white light) as uniform or homogeneous in color, it is actually composed of a broad range of radiation wavelengths in the ultraviolet ( UV ), visible and . UV – Visible Spectroscopy. A diagram of the components of a typical spectrometer are shown in the following diagram. The functioning of this instrument is relatively straightforward. A beam of light from a visible and/or UV light source (colored red) is separated into its component wavelengths by a prism or diffraction grating. Presentation topic – Ultra-violate spectroscopy Submitted by – Moriyom Akhter Md Shah Alam Department of pharmacy World university of Bangladesh; 2. UV visible spectroscopy.

UV VISIBLE SPECTROSCOPY Mr. Damkondwar January 2 2013; 2. Spectroscopy It is the branch of science that deals with the study of interaction of matter with light. OR It is the branch of science that deals with the study of interaction of electromagnetic radiation . While interaction with infrared light causes molecules to undergo vibrational transitions, the shorter wavelength, higher energy radiation in the UV (200-4nm) and visible (400-7nm) range of the electromagnetic spectrum causes many organic molecules to undergo electronic transitions. How this technique is used to analyze molecules with electrons.

Ultraviolet-visible spectropscopy (uv = 200-4nm, visible = 400-8nm) corresponds to electronic excitations between the energy levels that correspond to the molecular orbitals of the systems. In particular, transitions involving π orbitals and lone pairs (n = non-bonding) are important and so uv – vis spectroscopy is of most .