interference

interference - Diffraction and Interference light rays...

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1 Physical Optics 1 Interference Diffraction and Interference light rays passing through small openings exhibit wave behaviour they spread out ( diffract ) this means rays that start out in phase can bend and end up travelling different distances ( path differences ) this results in phase differences when they are superimposed hence we get interference Physical Optics: Diffraction & Interference we see interference effects due to superposition f waves of differing phases (path differences) of waves of differing phases (path differences) Consider Two Small Openings (a) geometrical optics regime (b) physical (wave) optics regime
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2 Water Wave Analogue Again, Two Sources of Shallow Water Ripples Interference Pattern observed from two slits bright and dark lines (or fringes) Clicker: Suppose the viewing screen in the figure is moved closer to the double slit. What happens to the terference fringes? interference fringes? A. They fade out and disappear. B. They get out of focus. C. They get brighter and closer together. D.They get brighter and farther apart. E. They get brighter but otherwise do not change.
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3 Clicker: Suppose the viewing screen in the figure is moved closer to the double slit. What happens to the interference fringes?
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interference - Diffraction and Interference light rays...

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