1Chapter 36In Chapter 35, we saw how light beams passing through different slits can interfere with each other and how a beam after passing through a single slit flares-diffracts- in Young's experiment. Diffraction through a single slit or past either a narrow obstacle or an edge produces rich interference patterns. The physics of diffraction plays an important role in many scientific and engineering fields.In this chapter we explain diffraction using the wave nature of light and discuss several applications of diffraction in science and technology. Diffraction36-
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2Diffraction Pattern from a single narrow slit.Diffraction and the Wave Theory of Light36-CentralmaximumSide or secondarymaximaLightFresnel Bright Spot.BrightspotLightThese patterns cannot be explained using geometrical optics (Ch. 34)!