Electromagnetic waves. 0.0 / 5 ? PhysicsElectromagnetic SpectrumGCSEAQA Created by: hanrobothamCreated on: 26-04-16 17:19 What are radiowaves used for? Broadcast TV & Radio Signals. Transmit satelite signals 1 of 13 What are microwaves used for? Communication with satelites. Phone signals. Heat up food 2 of 13 What is Infrared used for? Monitor temperature. Security Systems. Remote controls. It's given out by all hot objects 3 of 13 What is Visible Light and give and example of how it's used. All objects either give off or reflect VL. Cameras use a lens. Lens aperture controls how much light enters. 4 of 13 What can Ultra Violet be used for? Detect forged bank notes using fluorescent ink under UV. Fluorescent lamps use UV to emit VL. Security pens 5 of 13 What are X-Rays used for? Look inside objects (bone not flesh). Airports scan luggage and people for weapons.. 6 of 13 What can gamma rays be used for? Radiotherapy. Diagnose and treat cancer. Sterilization. 7 of 13 Give a disadvantage of microwaves. Heat human body cells. Phones link to brain tumours 8 of 13 Give a disadvantage of Infrared. Heating effect. Cause skin burns. 9 of 13 Give a disadvantage of Ultra Violet. Ionising. Sunburns. Cell mutation. Skin cancer. Eye damage. 10 of 13 Give a disadvantage of Gamma Rays & X-Rays. Ionising. Penetrate further into body. Cell mutation. Tissues damage and cancer. 11 of 13 Who discovered Infrared and how? Herschel. Measuring the temperatures of spectrum created through a spectrum. Infrared was hottest. 12 of 13 Who discovered Ultra Violet and how? Ritter, timing how long different colours of spectrum took to turn AgCl strips black. UV was quickest. 13 of 13
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