IGCSE Physics section C: Waves 4.0 / 5 based on 1 rating ? PhysicsWaves and SoundIGCSEEdexcel Created by: chloe pollardCreated on: 26-03-13 12:55 What do all waves have wavelength, frequency, amplitude and speed 1 of 29 what is amplitude it is the height of the wave 2 of 29 what is wavelength it is the distance from one peak to the next 3 of 29 what is frequency it is the number of complete waves per second that pass a certain point 4 of 29 what is speed (velocity) how fast something goes 5 of 29 what is the formula that includes frequency and time period f=1/T, frequency=1/time period 6 of 29 what is the wave speed formula v=fλ, speed= frequency x wavelength 7 of 29 In transverse waves what angle are the vibrations to the direction of the energy transferred by the wave 90 8 of 29 what direction do vibrations in longitudinal waves go the same direction as the wave transfers energy 9 of 29 what can all waves have done to them they can all be reflected, refracted and deffracted 10 of 29 what are the seven types of electromagnetic (EM) waves radio waves, micro-waves, infra-red, visable light, ultra-violet, x-rays, gamma rays 11 of 29 what kind of waves are EM waves transverse waves 12 of 29 what are radio waves mainly used for and why communication because the waves can diffract around the curved surface of the earth 13 of 29 why are microwaves used for satellite communication because they can pass easily through the earths atmosphere without being absorbed 14 of 29 why are microwaves used for cooking food because the waves are absorbed by the water molecules found in food heating them up so that the whole piece of food is cooked 15 of 29 what is infra-red radiation used in heating and monitoring temperature 16 of 29 what can light signals travel in optical fibres 17 of 29 what is ultra violet used in fluorescent lamps 18 of 29 why are x-rays used to take pictures of bones because x-rays easily pass through flesh but not through denser material like bone 19 of 29 why is gamma radiation used for sterilising food and medical equipment because it kills all microbes and when used on food it keeps food fresh for longer 20 of 29 whats more dangerous an EM radiation with a low frequency or an EM radiation with a high frequency high frequency EM radiation such as Gamma radiation 21 of 29 What does the reflection of light let us do see things 22 of 29 What is the order of the colour spectrum red, orange, yellow, green, blue, indigo, violet 23 of 29 what do triangular prisms do to white light it disperses the light 24 of 29 What is the formula for the refractive index n=sin i/ sin r, refractive index= sin i(incident ray)/ sin r(refractive ray) 25 of 29 in a semicircular block what happens if the angle of incidence (i) is less than the critical angle there is a partially reflected ray but most light passes out 26 of 29 in a semicircular block what happens if the angle of incidence (i) is equal to the critical angle there is a strongly reflected ray but an emerging ray comes out along the top 27 of 29 in a semicircular block what happens if the angle of incidence (i) is greater than the critical angle there is total internal reflection 28 of 29 what is the formula for the critical angle sin C=1/n, sin critical angle (C)=1/refractive index 29 of 29
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