(9) Internal Revenue Code means the Internal Revenue Code of 1986 in effect for the federal tax year beginning on January 1, 2007, not including any changes made by federal law after that date, and any regulations adopted under that code applicable to that period.
Absorbance spectroscopy, commonly referred to as spectrophotometry, is the analytical technique based on measuring the amount of light absorbed by a sample at a given wavelength.
Wave Physics Glossary and Terms. Absorption - Absorption is when some of the wave's energy is taken away when a wave encounters a medium. Amplitude - The measure of the displacement of the wave from its rest position. The higher the amplitude of a wave, the higher its energy. Coherence - Two waves are said to be coherent when they have a constant phase difference between them. Crest - The crest is the highest point of a wave. The opposite of the crest is the trough. Diffraction - Diffraction is when a wave remains in the same medium, but bends around an obstacle. Electromagnetic Waves - Electromagnetic waves are waves that can travel through a vacuum.