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Science Essay: Electromagnetic Spectrum There are many different types of electromagnetic waves in the electromagnetic spectrum. All of the waves are electromagnetic. The spectrum consists of these waves: Radio waves: They allow communication. Microwaves: They are used for cooking and also for mobile phones. Infra red: They are use for cooking, night vision, and recently they are being used to send information via mobile phones to other phones or computers to other devices. Visible light: For seeing, this is the only visible electromagnetic wave. Ultraviolet: For suntans X-Rays: for seeing broken bones. Gamma Rays: For treating cancer. Radio Waves To the Victorians, the telegraph was their equivalent to the internet; it allowed immediate communication to anyplace possible around the world. Nowadays we use radio signals to receive a wide range of communications, we use signals received from satellites to receive TV and radio programs. This system also allows phone calls to be made to anywhere around the world with really good sound quality, it may also be used for global pos