{"id":71856,"date":"2017-09-29T15:52:10","date_gmt":"2017-09-29T15:52:10","guid":{"rendered":"https:\/\/www.scantec.it\/engl\/?p=71856"},"modified":"2017-12-28T15:36:00","modified_gmt":"2017-12-28T15:36:00","slug":"what-are-emf","status":"publish","type":"post","link":"https:\/\/www.scantec.it\/en\/electromagnetic-field-measurement\/what-are-emf\/","title":{"rendered":"What are EMF"},"content":{"rendered":"

This paragraph explains some physical definitions and examples of probable sources of emission.<\/p>\n

DEFINITION OF ELECTRIC FIELD, MAGNETIC FIELD AND ELECTROMAGNETIC FIELD<\/strong><\/h4>\n\n\n\n\n\n\n\n
Kind of field<\/th>\nWhat produce them<\/th>\nPossible shielding<\/th>\nKind of radiations<\/th>\n<\/tr>\n<\/thead>\n
Electric<\/strong><\/td>\nEvery device connected at electric socket (even off)<\/td>\nThey can be shielded by common material (bricks, wood, metals)<\/td>\nNot Ionisable Radiation<\/td>\n<\/tr>\n
Magnetic<\/strong><\/td>\nThey are produced only by working electrical devices<\/td>\nThey are not easily shielded (except high conductivity metals, but they are expensive)<\/td>\n<\/tr>\n
Electromagnetic<\/strong><\/td>\nThey are generated by interaction between electric and magnetic fields, we distinguish them in low frequency and high frequencyChe cosa si intende per radiazione elettromagnetica?<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

What is an electromagnetic radiation?<\/strong>
\nElectromagnetic radiations are a kind of energy due to electromagnetic interaction, they may spread in vacuum and in the atmosphere. We distinguee them in Not Ionisable radiations and Ionisable Radiation.\u00a0<\/strong><\/p><\/blockquote>\n

DEFINITION OF NOT IONISABLE RADIATION AND IONISABLE RADIATION<\/strong><\/h4>\n\n\n\n\n\n\n
Kind of radiations<\/th>\nFrequency Range<\/th>\nEffects<\/th>\nExamples<\/th>\n<\/tr>\n<\/thead>\n
Not Ionisable Radiation (NIR)<\/strong><\/td>\n0 < f < 300 GHz<\/td>\nElectromagnetic pollution is due to an anthropic origin<\/td>\nRadio, television, mobile phone, radars, visible light<\/td>\n<\/tr>\n
Ionisable Radiation (IR)<\/strong><\/td>\n>300 GHz<\/td>\nThey produce the ionization process (creation of atoms and molecules electrically charged) breaking bonds that held molecules in cells<\/td>\nRadiographs<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
NIR frequency spectrum is very wide: in it we recognise low frequency fields and high frequency fields.<\/span><\/h5>\n

DEFINITION OF LOW FREQUENCY FIELD AND HIGH FREQUENCY FIELD<\/strong><\/h4>\n\n\n\n\n\n\n
Electromagnetic field<\/th>\nRange di frequenza<\/th>\nNozioni di fisica<\/th>\nSorgenti<\/th>\n<\/tr>\n<\/thead>\n
Low frequency<\/strong><\/td>\n0 Hz<f<400 KHz<\/td>\nElectromagnetic and magnetic fields are independent from each other, that remain localized near the generating sources. The field intensity decreases in function of distance.<\/td>\nPower lines, transformation cabins, household appliances<\/p>\n

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High frequency<\/strong><\/td>\n400 KHz<f<300 GHz<\/td>\nHigh frequency electromagnetic and magnetic fields are related, the existence of one implies the existence of the other and together they constitute the electromagnetic field.<\/td>\nBroadcasting aerials, base stations for mobile telephony, mobile phones, radars, microwaves, amateur radios, radio bridges<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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This paragraph explains some physical definitions and examples of probable sources of emission. DEFINITION OF ELECTRIC FIELD, MAGNETIC FIELD AND ELECTROMAGNETIC FIELD Kind of field What produce them Possible shielding Kind of radiations Electric Every device connected at electric socket (even off) They can be shielded by common material (bricks, wood, metals) Not Ionisable Radiation […]<\/p>\n","protected":false},"author":1,"featured_media":72304,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"acf":[],"yoast_head":"\nWhat are EMF | Scantec<\/title>\n<meta name=\"description\" content=\"Electromagnetic radiation is a form of energy associated with electromagnetic interaction; it can propagate in the void and in the atmosphere.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.scantec.it\/en\/electromagnetic-field-measurement\/what-are-emf\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What are EMF | Scantec\" \/>\n<meta property=\"og:description\" content=\"Electromagnetic radiation is a form of energy associated with electromagnetic interaction; 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