anonymous
  • anonymous
How can refraction, reflection and diffraction of waves be demonstrated using a ripple tank? Help please :)
Physics
  • Stacey Warren - Expert brainly.com
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katieb
  • katieb
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theEric
  • theEric
http://en.wikipedia.org/wiki/Ripple_tank
anonymous
  • anonymous
thank you! i will include some info in my discussion but there is one problem my school's ripple tank is not really modernize, it does not have an oscillating paddle and stroboscope :( What other methods can there be? The ripple tank only consists of the glass, wooden frame and a white screen below it to see the waves.
theEric
  • theEric
I think It said on there that letting water drops fall in would create noticeable waves! :)

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theEric
  • theEric
Is there a solid piece of something for water to flow over for refraction?
anonymous
  • anonymous
can a piece of wood work?
theEric
  • theEric
Yeah, I would think so! I've never worked with these, I just gave you a resource! You'll see the wood's shadow, but I would think it'd be fine!
anonymous
  • anonymous
hmm ok one more question, whats the difference between refraction, reflection and diffraction? :/
theEric
  • theEric
Reflection is the easiest, because we see it everyday! Are we talking about light?
anonymous
  • anonymous
water waves
theEric
  • theEric
When water hits a surface, it will be redirect at an angle from the normal that it came from.|dw:1378684726434:dw|One sec!
theEric
  • theEric
|dw:1378684855061:dw|
theEric
  • theEric
I'm not used to working with water, but I know that it will follow that. It will loose some kinetic energy, but it's direction will work like that, somewhat.
anonymous
  • anonymous
hmm now i understand! Is that reflection?
theEric
  • theEric
And I don't think that a piece of wood would work for refraction...
theEric
  • theEric
That is reflection, yes! The pesky thing about water is that it sticks to itself. That property of water is called cohesion, and many liquids have it.. So when water hits a wall...|dw:1378685238503:dw|other water will go with the flow... But the basic principle is visible, especially in larger tanks!
theEric
  • theEric
When I draw arrows, they're really like the propagation of waves, in case that wasn't clear. Refraction is due to a change in the wave speed. The picture below is pretty rough. But I look at one wave front. When it passes over the triangle, the water is shallow and the wave is slower. I don't know why, but it is! Now, in the picture, I draw parts along the wave as they travel in a certain amount of time. You'll see that the wave that is in the deep section longer goes farther because it is in the "fast lane" longer. The water that spends more time in the shallow section doesn't go as far, because it's stuck in the slower area for longer. |dw:1378685386304:dw|
theEric
  • theEric
|dw:1378685881570:dw| You can see how the wavefront looks, now.
anonymous
  • anonymous
alright :) and diffraction?
theEric
  • theEric
I'm not too sure about how diffraction works, sorry! You can see what it looks like in that Wikipedia article, though!
anonymous
  • anonymous
oh ok thanks for everything!! ^_^
theEric
  • theEric
You're welcome! Good luck and have fun with the ripple tank!
anonymous
  • anonymous
thanks i will !

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