Group presentation electromagnetic spectrum
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This document divides the electromagnetic spectrum into 7 groups based on their applications: radio waves are used for broadcasting and communications; microwaves are used for satellites and cell phones; infrared rays are used in appliances, remote controls and night vision; visible light is used for optical fibers and photography; ultraviolet rays are in fluorescent lamps and for sterilization; X-rays have medical and engineering uses; and gamma rays are used for medical treatment.
Group presentation electromagnetic spectrum
- 1. Group 1 : Radio waves Broadcasting & communications Group 2 : Microwaves Satellites & cellular telephones Group 3 : Infra-red rays Household appliances, remote controls and night-vision devices Group 4 : Visible light Optical fibres & photography Group 5 : Ultraviolet rays Fluorescent lamps & sterilization Group 6 : X-rays Hospital and engineering applications Group 7 : Gamma rays Medical treatment