![]() Notice that for white light the colours are splits, but there is a central part which remains white. To calculate the fringe spacing we use the following relationship:ĭ = Distance between the slits and the screen (m) The interference pattern recorded looks something like this: ![]() At some points there will constructive interference and at some points destructive interference. A screen at a given distance away will show the interference pattern. When light travels through a double slit, the waves diffract and start to interfere with each other. This last diagram shows how to get monochromatic coherent light in order to put it through a double slit in order to see the interference patterns. Refraction Diffraction & Interference Interference
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