GCSE›Edexcel GCSE Physics›Mind mapsElectromagnetic WavesEdexcel GCSE Physics: Mind mapStudy pack PDFAlso for this subtopic:Revision notesFlashcardsSubtopic testCover factsPropertiesAll are transverse wavesSame speed in a vacuumTransfer energy from source to observerEyes detect only visible lightThe spectrumRadio, microwave, infraredVisible, ultravioletX-ray, gammaIncreasing frequency left to rightRadio has the longest wavelengthGamma has the shortest wavelengthDangersDanger rises with frequencyMicrowaves: internal heating of cellsInfrared: skin burnsUltraviolet: surface cell damage, skin cancerX-rays and gamma: mutation or cell damageEM wavesthe EM spectrumHzmcUses low endRadio: broadcasting and communicationsMicrowaves: cooking and satellitesInfrared: thermal imaging, remote controlsVisible: vision and photographyUses high endUV: fluorescent lamps, forged notesUV: disinfecting waterX-rays: internal structure, airport securityGamma: sterilising, cancer treatmentExam tipsLearn the order: radio, micro, infra, visible, ultra, X, gammaRadio waves are not dangerous like X-rays