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Behavior of Light

Behavior of Light. Huygens (Dutch Scientist) - light can be thought of as an infinite number of point sources. Interference Patterns- Areas of Constructive and Destructive Interference. Shine a light through two slits and you create 2 point sources that give you an interference pattern.

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Behavior of Light

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  1. Behavior of Light

  2. Huygens (Dutch Scientist) - light can be thought of as an infinite number of point sources

  3. Interference Patterns- Areas of Constructive and Destructive Interference

  4. Shine a light through two slits and you create 2 point sources that give you an interference pattern

  5. Young’s Double Slit Experiment - Shine a light through two slits and you create 2 point sources that give you an interference pattern

  6. Double Slit Interference

  7. Remember the areas of light and dark are areas of constructive (max) and destructive (min) interference

  8. Similar to water (ripple tank) you can use the anti-nodes (bright lines) to find the wavelength of a light source

  9. Equation for double slit interference • Similar triangles tell you that x/L = /d • General equation:  = dx/nL

  10. Equation for double slit interference  = dx/nL where  = wavelength of light source (m) d = distance between the slits (m) L = distance between the source and screen (m) x = distance between n=0 line and bright line you are using for calculation (1st order n=1, 2nd order n=2, etc.)

  11. Useful Conversion Factors • 1 nm = 10-9 m • m = 10-6 m • nm = 10-3m

  12. What can you see in our lab?

  13. What can you see in our lab?

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