Diffraction 0.0 / 5 ? PhysicsWavesASOCR Created by: apple87Created on: 26-05-15 11:36 When the gap is a lot bigger than the wavelength diffraction is... Unnoticeable 1 of 13 When the gap is several wavelengths wide diffraction is.. Noticeable 2 of 13 When do you get the most diffraction? When the wavelength is the same size as the gap. 3 of 13 When are most of the wave reflected back? When the gap is smaller than the wavelength. 4 of 13 What happens when a wave meets an obstacle? Diffraction around the edges and a shadow behind the object 5 of 13 What happens to the shadow when the objects gets wider? The shadow gets longer. 6 of 13 What happens if the wavelength of a light wave is roughly the size of the apertue? Diffraction pattern of light and dark fringes. 7 of 13 What does the pattern look like? Bright central fringe with alternating dark and bright fringes on either side of it. 8 of 13 How does the width of the slit affect the diffraction pattern? Th narrower the slit the wider the diffraction pattern. 9 of 13 What sort of light source needs to be used in a slit experiment? Coherent 10 of 13 Where is the brightest point of a difraction pattern? Where the light passes in a straight line from the slit to the screen. The light wave at this point are in phase. 11 of 13 Where is there a constant phase difference? At the other bright points that are to the sides of the central bright point. 12 of 13 What shape to the phasors form when there is a dark fringe, and what is the resultant? Circle which gives a reultant of zero 13 of 13
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