How Does Light Intensity Vary with One Slit in a Diffraction Experiment?

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SUMMARY

In a diffraction experiment using a single slit, the light intensity distribution results in a central maximum that is brighter and wider than the side fringes. The central fringe is symmetrical, with the intensity decreasing as one moves away from the center. This phenomenon occurs due to the wave nature of light, where constructive and destructive interference patterns are formed. When using diffraction gratings, the maximum brightness is observed at the center due to the coherent superposition of light waves, which is also applicable in single-slit diffraction.

PREREQUISITES
  • Understanding of wave-particle duality of light
  • Familiarity with interference patterns in optics
  • Knowledge of diffraction principles
  • Basic concepts of light intensity measurement
NEXT STEPS
  • Study the mathematical derivation of single-slit diffraction patterns
  • Explore the concept of fringe width in single-slit experiments
  • Learn about the role of slit width in determining diffraction patterns
  • Investigate the differences between single-slit and double-slit interference
USEFUL FOR

Physics students, optical engineers, and educators seeking to deepen their understanding of light behavior in diffraction experiments.

Vaseline
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If one slit is used instead of 2 in a diffraction experiment, how does light intensity vary?

I think.. Central fringe brighter, symmetrical fringes either side of central fringe, central maximum twice the width of side fringes..

But I'm not sure why?

Also, using diffraction gratings – why is the maximum brightness in the middle?
 
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Think about why fringes exist at all when you have 2 slits. Does the same reasoning apply with 1 slit?
 

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