This presentation provides a comprehensive overview of electromagnetic waves and radiation, beginning with an introduction to different types of waves and their presence in everyday life. It details the fundamental principles and properties of electromagnetic waves, such as their transverse nature, ability to travel through a vacuum, and refraction and reflection capabilities. The presentation illustrates the electromagnetic spectrum, categorizing waves from higher to lower energy (gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, radio waves) and their respective applications. Examples are given to explain electric and magnetic fields, followed by a discussion on the properties of microwaves and infrared radiation, including their uses in remote controls, heaters, and communication. Furthermore, the presentation examines the uses and hazards of X-rays in medical applications and crime scene investigation, contrasting the properties of visible and UV light. Finally, it addresses the biohazards of ultraviolet and infrared radiation, highlighting their potential dangers to health and mental well-being, with references to relevant online resources.
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