Why the water waves bend in diffraction?

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SUMMARY

Diffraction occurs when water waves pass through a narrow gap, resulting in the bending of wavefronts into circular patterns. In contrast, when waves travel through a wide slit, the wavefronts maintain a straight trajectory. This phenomenon can be explained using Huygens' Principle, which states that each point on a wavefront acts as a source of circular waves. Understanding these principles is crucial for comprehending wave behavior in various mediums.

PREREQUISITES
  • Understanding of wave mechanics
  • Familiarity with Huygens' Principle
  • Basic knowledge of wavefronts and their properties
  • Experience with ripple tank experiments
NEXT STEPS
  • Study Huygens' Principle in detail
  • Explore the effects of wave interference in ripple tanks
  • Investigate the relationship between wave frequency and diffraction patterns
  • Examine real-world applications of diffraction in optics
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Students of physics, educators teaching wave phenomena, and anyone interested in the practical applications of wave behavior in experiments and technology.

Aladin
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Waves bend when they pass throungh a narrow gap.It is the definition of diffraction.
what is the reason that when the water waves pass through a narrow gap in ripple tank the wavefronts become circular?
what is the reason that when the water waves pass through a wide slit in ripple tank the wavefronts remain straight?
please explain.
 

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This can be explained using "[URL Principle[/URL], where the wavefront at any point is considered to generate a circular wave at every point to advance itself. I didn't say that very well, but the Link may explain better. Be sure to check out the java applets link at the bottom of the Wikipedia page.

I like to think of it in this way. Whenever a wave encounters a "disturbance", it will generate a circular "ripple" centered at that disturbance. This sort of explains reflection, refraction and diffusion.
 
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