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Young’s Experiment

Young’s Experiment. Ripples. Wave on the surface of water have both constructive and destructive interference. Gaps where the ripples cross are from the destructive interference. From two point sources there is a pattern of constructive and destructive interference.

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Young’s Experiment

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  1. Young’s Experiment

  2. Ripples • Wave on the surface of water have both constructive and destructive interference. • Gaps where the ripples cross are from the destructive interference.

  3. From two point sources there is a pattern of constructive and destructive interference. Paths of destructive interference from nodes. Paths of constructive interference form antinodes. Two Sources

  4. A slit in a barrier converts a plane wave into a point source. A double slit creates two point sources. Lines of nodes and antinodes Double Slit

  5. Young’s Experiment • Young’s experiment of 1801 demonstrated the wave nature of light.

  6. Constructive interference occurs when the path is shifted by a whole number of wavelengths. m is the order of the maximum Destructive interference occurs in between maxima. Right Triangle

  7. The complete pattern from a double slit includes bright and dark bands. Central maximum at m = 0 First minimum at m = ½ Interference Pattern

  8. The separation of first minima depends on the geometry and wavelength. Distance to screen D Separation on screen Dx Other maxima and minima separations can be found by extending Dm. Screen Shots next

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