Physics
Electromagnetic waves encompass a broad spectrum, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. These waves can travel through a vacuum and all obey the wave equation, traveling at the speed of light in air and vacuum while slowing down in mediums like water or glass.
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Physics E.M. Sprectrum Increasing Wavelength g
X-Rays Ultra-Violet Rays Violet Indigo Blue Green Yellow Orange Red Radio Waves Properties They can be reflected or refracted. They all obey the wave equation Velocity= Frequency x Wavelength They transfer energy from one place to another. All travel at the speed of light (3x10^8 ms^-1 in air and a vacuum. They will slow down when travelling through water or glass. They are transverse Waves. They can travel through Vacuum. 2 Kinds of Radiation emitted from electromagnetic rays Ionising radiation Are harmful and can damage living cells and tissues Non-ionising radiation Non harmful radiation which would not harm living cells and tissues Increasing Frequency Radio waves Radio and television communication Microwaves Radar communication , Microwave cooking Infra-red Intruder alarms, Remote control of electrical appliances , Radiant heater Visible Light Photosynthesis, Lasers for medical , industrial and surveying Ultra-violet Rays Sunbeds , Forgery detection X-rays Airport Security, Medical/Dental inspections, Analysis of crystal structure Gamma Rays Treatment of cancer, Sterilising equipment Effects of E.M. Waves Infrared heating Our skin absorbs the infrared waves which makes us feel warm. The source of this heat can be seen like the red colour of a hot charcoal.
