Quantum theory of light

The photocatalytic oxidation of reactive blue 2 and reactive red 120 has been studied by using TiO2 Degussa P25 as catalyst and UV-light. The formation of intermediate molecules could be predicted on the basic of point charge calculations on all the individual atoms of the dyes. The agreement between calculations from quantum theory and the results of experiments was the background to establish a pathway for degradation of reactive dyes. A plausible mechanism of dye photodegradations is discussed.

6p uocvong03 24-09-2015 84 3   Download

It has been known from the previous chapter that light, and in general, electromagnetic waves have particle behavior. Some latter time than the quantum theory of light, it was discovered that particles show also wavelike behavior. The wave-particle duality of matter is the fundamental concept of modern physics Newton’s classical physics should be replaced by the new mechanics which is able to describe the wave nature of particles

34p thanhan 22-07-2009 171 18   Download

At the end of the 19-th century, physics was at its most confidence situation. Classical phyics, as formulated in Newton’s law of mechanics and Maxwell’s theory of electromagnetism, have proved very successful in solving every problem. →At that time there seemed to be no question for which physics could not provide an answer !!! But then it came as a great shock when some simple phenomena were observed which could not be explained by classical physics →a new theory, quantum theory, was developed at the beginning of the 20-th century...

25p thanhan 22-07-2009 176 15   Download