![]() ![]() Microwaves are high-frequency electromagnetic radiations. ![]() make use of electromagnetic radiations to transmit and receive information. UV rays are also used by doctors to sterilize surgical instruments and air in the operation theatre.Ī number of communication devices such as cellular phones, telephones, telegraphs, television, etc. When water is exposed to UV rays, the germs and bacteria get killed, and the water turns safe for drinking. Hence, ultraviolet radiations are mostly used for the purpose of sterilization. It is experimentally verified that ultraviolet rays can kill bacterias. The electromagnetic rays lying in the wavelength range of 80 nanometers to about 10 nanometers are known as UV rays or ultraviolet rays. MRI or magnetic resonance imaging also makes use of electromagnetic waves for the purpose of detecting and curing tumours and other disorders. For instance, X-Rays are used to get an image of tissues and bones, thereby allowing the medical examiner to locate broken bones or injured body tissues. These properties make them useful in various kitchen appliances.Ī number of electromagnetic waves are used for medical diagnosis purpose. Microwaves get reflected on striking a metallic surface and get absorbed by the food. The frequency range of microwaves lies between 1 GHz to 1000 GHz. Also, they do not get absorbed by the obstacles present in the pathway, thereby making long-distance communication possible.Īs the name signifies, microwave ovens make use of high energy possessed by the microwaves to cook or heat the food. Radio waves can travel through the air easily, which makes signal transmission simple. Radio Waves are typically used for the purpose of signal broadcasting via various signal modulation techniques such as frequency modulation, amplitude modulation, etc. According to modern quantum theory, an electromagnetic wave is a flow of photons through space.Įxamples of Electromagnetic Waves 1. Hence, the gamma rays are the high frequency and short wavelength radiations, while the radio waves are the low frequency and long wavelength radiations. The energy possessed by the gamma rays is the highest, whereas the energy possessed by the radiowaves is the lowest. In the electromagnetic spectrum, the electromagnetic waves are properly arranged according to their wavelengths or frequency. This spectrum includes all the electromagnetic radiations existing in nature, namely, gamma rays, x rays, ultraviolet radiations, visible rays, infrared radiations, microwaves, and radio waves. The ordered representation of electromagnetic waves is given by an electromagnetic spectrum. Electromagnetic waves move at the speed of light and are capable of travelling in a vacuum or free space. ![]() The electric field, magnetic field, and the direction of wave propagation are aligned mutually perpendicular to each other. Electromagnetic radiations are the energy radiations that possess a time-varying electric and magnetic field. ![]()
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