Transcript Slide 1
click to watch http://www.youtube.com/w atch?v=cfXzwh3KadE&list=P L2D6507E06F9A7FB2 How can you remember the order of the electromagnetic waves? radio gamma ultraviolet microwave http://www.bbc.co.uk/learni ngzone/clips/theelectromagneticspectrum/10676.html visible Xrays infrared So why do we need to know about electromagnetic waves? Because they are so useful... http://www.bbc.co.uk/learningzone/clips/uses-ofelectromagnetic-waves/10677.html wavelength long – just less than a metre to a few km frequency lowest uses energy broadcasting, some satellite transmissions low http://www.youtu be.com/watch?v= Sgo41iUN1-s wavelength frequency uses energy a few cm. low satellite transmissions, mobile ‘phone signals, cooking and weather forecasting. low http://video.nationalgeographi c.co.uk/video/science/weirdscience-sci/idkt-microwaveovens/ wavelength frequency shorter less than a mm low uses thermal images, cooking optical fibres, T.V remote controls and security systems energy moderate Just like on the last video or ... http://www.youtube.c om/watch?v=f_CM4nlj nrQ wavelength short thousandths of a mm frequency medium uses vision, photography and illumination energy moderate http://www.youtu be.com/watch?v= sBWPCvdv8Bk wavelength short frequency uses medium fluorescent lamps, detecting forged bank notes, disinfecting water energy moderate http://www.youtube.c om/watch?v=Cz1PJVp 27tc&feature=related wavelength frequency uses very short high observing inside things, medical X-rays energy high http://www.youtube.com/watch?v=umnnA50IDIY http://www.youtube.co m/watch?v=umnnA50ID IY wavelength frequency uses energy very short very high sterilizing food and medical equipment, This video is about detecting cancer and its cancer treatment. treatment http://www.youtube.com/watch?v=umnnA50IDIY high http://www.y outube.com/ watch?v=Hv1 Of2_drRc Now you should have all the information you need for your poster.