Physics-The electromagnetic spectrum 4.0 / 5 based on 1 rating ? PhysicsElectromagnetic SpectrumGCSEWJEC Created by: Sophie ConwayCreated on: 17-12-13 17:38 What is the order of the electromagnetic spectrum? Radio Waves,Micro Waves,Infrared,Visible light,Ultra-violet,x-rays,gamma 1 of 15 What waves do radio waves have? long waves 2 of 15 What does each successive region have in terms of waves? a shorter wavelength ending with gamma rays,which have the shortest waves 3 of 15 What is the frequency of radio waves? low frequency 4 of 15 what does each successive region have in terms of frequency? a higher frequency ending with gamma rays,which have the highest frequency 5 of 15 What speed do all electromagnetic waves travel at? the same, which is in a vacuum 6 of 15 Name the uses of microwaves sky satellite transmission,mobile phone signals,microwave ovens 7 of 15 Name the uses of infra red remote control systems,thermal imaging 8 of 15 Name the uses of visible light seeing, communication 9 of 15 What do ultra-violet,x-rays and gamma rays all have in common? they are all ionising radiations that can cause cancers if we are over exposed 10 of 15 How does the total internal reflection occur? when light strikes a surface at a angle greater than its critical angle. This allows optical fibres to carry information over large distances 11 of 15 why may there be health risks from the over exposure to microwaves? due to mobile phones or tetra masts 12 of 15 Where are geosynchronous satellites? they stay above the same point on the earths surface. 13 of 15 what does geosynchronous satellites being above the same point on the earths surface allow? intercontinental communication by using microwaves that pass easily through the earths atmosphere 14 of 15 where is infrared radiation used? in intercontinental optical fibre links 15 of 15
Comments
No comments have yet been made