Diffraction & Double Slit Experiment

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Diffraction & Double Slit Experiment

  1. 1. DiffractionThe bending ofwaves around theedges of barriers
  2. 2. Diffraction(a) the diffraction effects are greater for long wavelength waves(b) the diffraction effects are greater for small holes
  3. 3. Youngs Double Slit Experiment
  4. 4. Double SlitExperiment
  5. 5. Double SlitExperiment
  6. 6. Double SlitExperiment
  7. 7. Double Slit ExperimentConstructive Interference (Bright, maxima): d sin θ = mλDestructive Interference (Dark, minima): d sin θ = (m + ½)λ
  8. 8. Sample Problem #1 Monochromatic light falling on twoslits 0.016 mm apart from each other produces a 5th order fringe at an angle of 8.8 degrees. What is the wavelength of the light used?
  9. 9. Sample Problem #2A screen containing two slits 0.100 mm apart is 1.2 m from the screen. Light with a wavelength of 500 nm falls on the slits from a distant source. Approximately how far apart are theadjacent bright interference fringes on the screen?
  10. 10. Sample Problem #2
  11. 11. Intensity
  12. 12. Dispersion
  13. 13. Polarization
  14. 14. Critical Angle
  15. 15. MirrorsMirrors- f is + for concave, - for convex- do and di are + for real objects & images- do and di are - for virtual objects & images- m is + for upright images, - for inverted images
  16. 16. LensesLenses- f is + for converging, - for diverging- do and di are + for real objects & images- do and di are - for virtual objects & images- m is + for upright images, - for inverted images

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