UV Infra - red Micro - wave UHF

Light is an electromagnetic transverse wave, which means that it oscillates in directions perpendicular to its propagation (see Figure 1). Since light is a wave, it is characterized by its wavelength—the distance from peak to peak. Electromagnetic wavelengths cover a very wide range but only a tiny part of this range (about 400 to 700 nanometers) is visible to humans and thus of interest for shading (see Figure 2). The effect matter has on light is defined by a property called the refractive index. The refractive