The electromagnetic spectrum is composed of electromagnetic radiations that exhibit different characteristics. Some have a longer wavelength than others. In addition, some have a higher penetration power than others. Gamma Rays, X-rays, Ultra Violet (UV), Visible light, Infra Red (IR) and Radio-waves are common examples. The special characteristics possessed by the electromagnetic make each of them unique. For example, the X-rays are widely used in the medical field due to its high penetration power (Bhusan 65). This paper outlines the various sources, characteristics, components and applications of IR.

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