The document discusses the electromagnetic spectrum, which is the range of different types of electromagnetic radiation. It notes that electromagnetic radiation includes visible light, radio waves, microwaves, infrared, ultraviolet, X-rays and gamma rays. These different types of electromagnetic radiation are classified based on their frequency and wavelength, with radio waves having the lowest frequency and longest wavelengths, and gamma rays having the highest frequency and shortest wavelengths. The document also provides some examples of applications of these different types of electromagnetic radiation, such as using radio waves for telecommunications, microwaves for heating food in ovens, infrared for remote controls, and X-rays and gamma rays for medical applications.

1. Electromagnetic Spectrum

2. Electromagnetic Spectrum ( Introduction ) The electromagnetic (EM) spectrum is just a name that scientists give a bunch of types of radiation when they want to talk about them as a group. Radiation is energy that travels and spreads out as it goes-- visible light that comes from a lamp in your house and radio waves that come from a radio station are two types of electromagnetic radiation. Other examples of EM radiation are microwaves , infrared and ultraviolet light, X-rays and gamma-rays .

3. Types Of Radiations Radio Waves Microwaves Infrared Radiation Visible Light Ultra-Violet Ray X-Ray Gamma-Ray - Low Frequency & Longest Wavelengths - High Frequency & Shortest Wavelengths

5. Applications Of Radiation Radio Waves - Telecommunications Microwaves - Heat Food In Microwaves Oven Infrared Radiation – Remote Controllers Visible Light – Allow Us To See Ultra-Violet Ray - Sunbed X-Ray – Checking Of Fractured Bones Gamma-Ray – Kill Cancer Cells