ABSTRACT
The UV and visible light are parts of optical radiation (Fig. 5.1), and can be divided into subgroup A, B, and C, and appropriate colors, respectively (Tab. 5.1) [2-4]. These lights behave like wave, can be characterized by the wavelength (A,) and frequency (v), where the X is the length of the cycle, and v is the number of cycles per unit time [4]. The wavelength and frequency have a relation like that:
(5.2)
where u is the velocity of propagation and c is the velocity of light travels through a vacuum. Tab. 5.2 shows the typical values of wavelength and frequency of UV and visible light [4].
