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Electromagnetic Radiation - Coggle Diagram
Electromagnetic Radiation
Electromagnetic Radiation (EMR) is the set of waves of an electromagnetic (EM) field, which propagate through space and carry momentum and electromagnetic radiant energy.
Production of EM waves
Accelerated Charges: When electric charges, such as electrons, accelerate (e.g., oscillate), they emit energy in the form of electromagnetic waves.
Examples: Radio transmitters accelerate electrons in antennas to produce radio waves; electrons transitioning between energy levels in atoms emit visible light.
Types of EM Waves Based on Wavelength
Microwaves: Shorter than radio waves; utilized in microwave ovens and radar technology.
Radio Waves: Longest wavelength; used in communication systems like radio and television.
Visible Light: The narrow band detectable by the human eye; essential for vision.
Infrared (IR): Experienced as heat; employed in remote controls and thermal imaging.
Ultraviolet (UV): Beyond visible light; has applications in sterilization and can cause sunburn.
X-Rays: Penetrate soft tissues; widely used in medical imaging.
Gamma Rays: Shortest wavelength; arise from nuclear reactions and are used in cancer treatment.
Applications of EM Waves:
Radio Waves: Broadcasting audio and visual content; wireless communications.
Microwaves: Cooking food; satellite communications; Doppler radar.
Infrared: Night-vision equipment; heating; optical fiber communications.
Visible Light: Illumination; photography; various optical instruments.
Ultraviolet: Disinfecting medical equipment; fluorescent lighting; forensic analysis.
X-Rays: Diagnosing fractures and infections; security scanning.
Gamma Rays: Treating cancer through radiotherapy; sterilizing medical tools.