Ocean waves parallel to the shore

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SUMMARY

Ocean waves break parallel to the shore due to the principles outlined in Huygens's Principle. As waves approach shallower water, their speed decreases while frequency remains constant, resulting in a decrease in wavelength. This change causes the wavefronts to bend towards the normal of the shore, leading to the observed phenomenon of waves breaking approximately parallel to the shoreline. The discussion emphasizes the importance of accurately applying Huygens's Principle to explain this behavior.

PREREQUISITES
  • Understanding of Huygens's Principle
  • Basic knowledge of wave mechanics
  • Familiarity with wave speed, frequency, and wavelength relationships
  • Concept of wave refraction in shallow water
NEXT STEPS
  • Study Huygens's Principle in detail, focusing on wavefronts and secondary wavelets
  • Research wave refraction and its effects on coastal wave behavior
  • Explore the relationship between wave speed, frequency, and wavelength in different mediums
  • Examine case studies of wave behavior in various coastal environments
USEFUL FOR

Students of physics, oceanographers, and anyone interested in understanding wave dynamics and coastal processes.

PhysicsKid99
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Homework Statement


Explain, using Huygen's Principle, why ocean waves break parallel to the shore.

Homework Equations


None

The Attempt at a Solution


Okay, I know that the speed of the waves decreases as the water gets shallower. Therefore, since the frequency is the same, the wavelength decreases. The water is bent towards the normal to the shore, this breaking approximately parallel to it. But how do I bring in Huygen's Principle?
 
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PhysicsKid99 said:
The water is bent towards the normal to the shore
Is that correct?

How to explain the wave phenomenon observed?

Huygens's Principle:
every point on a propagating wavefront serves as the source of spherical secondary wavelets, such that the wavefront at some later time is the envelope of these wavelets. If the propagating wave has a frequency, f, and is transmitted through the medium at a speed, v, then the secondary wavelets will have the same frequency and speed.
 
PhysicsKid99 said:
The water is bent towards the normal to the shore
Water doesn't bend. Can you express that a bit more accurately?
 

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