Wiktionary(1.50 / 2 votes)Rate this definition: 1  construct(Noun) Something constructed from parts. The artwork was a construct of wire and tubes. 2  construct(Noun) A concept or model. Bohr's theoretical construct of the atom was soon superseded by quantum mechanics. 3  construct(Verb) To build or form (something) by assembling parts.
In spectroscopy, the type of interaction between light and the material is usually â Absorption spectroscopy, Emission spectroscopy, Elastic scattering and reflection spectroscopy, Impedance spectroscopy, Inelastic scattering, Coherent or resonance spectroscopy.
Photochemistry is the branch of chemistry concerned with the chemical effects of light. Generally, this term is used to describe a chemical reaction caused by absorption of ultraviolet (wavelength from 100 to 400 nm), visible light (400 - 750 nm) or infrared radiation (750 - 2500 nm).