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The wave nature of light

Explore Huygens’ principle, interference, diffraction, and Young’s double-slit experiment to understand light's behavior as waves. Discover how wavelets spread out, causing constructive and destructive interference in the double-slit setup. Learn about diffraction by single slits and how minima and maxima occur based on interference fringes.

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The wave nature of light

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  1. The wave nature of light Physics Department, New York City College of Technology

  2. Huygens’ principle Interference Diffraction Young’s double-slit experiment Key words

  3. Every point on a wave front can be considered as a source of tiny wavelets that spread out in the forward direction at the speed of the wave itself. Huygens’ principle

  4. Constructive interference Occurs when m is the order of the interference fringe Interference - Young’s double slit experiment

  5. Destructive interference Occurs when Young’s double slit experiment

  6. Microwave double slit interference • Insert video • Disc 23, #10

  7. Example #1 • Laser wavelength

  8. Diffraction refers to the spreading or bending of waves around edges. Diffraction

  9. Diffraction by a single slit • The minima occur at • Note that m=0 corresponds to the strongest maximum

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