T2 - The Electromagnetic Spectrum 3.0 / 5 based on 1 rating ? PhysicsElectromagnetic SpectrumGCSEEdexcel Created by: ShannonCreated on: 21-10-12 17:24 Can waves travel in a vacuum? Yes 1 of 17 What speed do electromagnetic waves travel at in a vacuum? 300,000,000 m/s 2 of 17 Do electromagnetic waves allow vibrations in electric and magnetic fields? Yes 3 of 17 What is a spectrum? A range of things, ranging from one extreme to the other 4 of 17 What is the electromagnetic spectrum? The entire frequency range of electromagnetic waves 5 of 17 Order of electromagnetic waves Gamma, X-ray, Ultra-violet, Visible Light, Infrared, Microwaves, Radio 6 of 17 How did Herschel contribute to the discovery of waves beyond the limits of the visible spectrum? He discovered infrared 7 of 17 How did Herschel contribute to the discovery of waves beyond the limits of the visible spectrum? He discovered ultra-violet 8 of 17 How did Herschel discover infrared? Thermonmeter 9 of 17 How did Ritter discover ultra-violet? Silver chloride powder 10 of 17 What is the relationship between frequency and danger of EM waves? The higher the frequency the more dangerous 11 of 17 Why are UV, X-ray and Gamma rays dangerous? They have a high frequency 12 of 17 What is ionisation? When ions are made, knocking the electron off of an atom 13 of 17 What is ionising radiation? Radiation or certain types of high-energy particless that can cause atoms to become electrically charged (to become ions) 14 of 17 Describe how isonisation causes damage to the body Can cause tumas, which lead to cancer 15 of 17 Where do gamma rays come from? Gamma rays come from radioactive elements 16 of 17 What other types of ionising radiation come from radioactive elements? Alpha and Beta 17 of 17
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