Taransverse waves and Polarisation 0.0 / 5 ? PhysicsWavesASOCR Created by: apple87Created on: 05-04-15 13:13 What is a transverse wave? When the vibrations are at right angles to the waves direction of travel. 1 of 15 Give three examples of transverse waves Electromagnetic, water ripples, waves on rope. 2 of 15 What are the two main ways of drawing a transverse wave graph? Displacement against distance or displacement against time. 3 of 15 What is a longitudional wave? The vibrations are along the waves direction of travel. 4 of 15 Give an example of a longitudional wave. Sound 5 of 15 What is a polarised wave? When a wave is passed though a vertiacal gap like a fence, the result is vertical waves becuase the gap fllters out vibrations in other directions. 6 of 15 What is electromagnetic radiation made up of? Electric and magnetic fields. 7 of 15 What would have if light passed through two polarising filters at right angles to eachother. No light would get through as all directions of vibration will be blocked. 8 of 15 Can polaristion happen for longitudional waves? No 9 of 15 What happens when light is reflected? The light becomes partially polarised. 10 of 15 Why are the rods on a tv aerial horizontal? The signal is polarised by by the oreintation of the rods which all have to be aligned. 11 of 15 Whay do some communication satalights poleraise signals in the same frequency band? To reduce interference between signals. 12 of 15 When is polarisation used in nature? Bees(and other insects) use polarised light to help them navigate and direct other bees. 13 of 15 How do CD's use polarisation? Use a polarising crystal to transmit light polarised in one direction and reflect ligh polarised in another direction. 14 of 15 How do photographers and skiers use polarising lenses? Remove unwanted relection in pictures and block glare of sunlight off the snow. 15 of 15
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