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The Disappearing Beaker: An Engaging Physics Demonstration with Simple Math

Discover the fascinating physics behind "The Disappearing Beaker" demonstration designed by Hope Concannon from the North Carolina School of Science and Mathematics. This engaging experiment utilizes straightforward mathematical principles to motivate and enhance understanding of physical concepts. Learn how to captivate your audience and simplify complex ideas in physics through a memorable visual experience. Ideal for educators and students alike, this demonstration promises to inspire enthusiasm for science.

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The Disappearing Beaker: An Engaging Physics Demonstration with Simple Math

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  1. The Disappearing Beaker

    Hope Concannon The North Carolina School of Science and Mathematics 1219 Broad Street Durham, NC 27705 email: concannon@ncssm.edu The simple mathematics you can use to motivate one of the best and easiest physics demonstrations ever
  2. http://eyestravel.eu/wp-content/uploads/2013/03/refraction.jpg http://eyestravel.eu/wp-content/uploads/2013/03/refraction.jpg We have all experienced refraction when we notice the apparent bending of an object when it is dipped in water. What is really going on here?
  3. http://www.opticampus.com/nature_light/images/Slide13.GIF
  4. http://www.patana.ac.th/secondary/science/anrophysics/ntopic4/images/car_refraction.jpg http://www.patana.ac.th/secondary/science/anrophysics/ntopic4/images/car_refraction.jpg
  5. The Law of Refraction Notice the tie between this equation and the Law of Sines!
  6. Some implications and activities using the Law of Refraction Light bends at a boundary between two materials with different optical densities. http://www.gareyscience.com/ana22/waves_online_lesson/refraction-pencil-all.jpg
  7. If you want a quick lab, students can measure the angle of incidence and angle of refraction and verify that the Law of Refraction describes what they see. http://farm5.static.flickr.com/4129/5079318821_8ac68e77f5.jpg
  8. Total Internal Reflection http://theboard.byu.edu/media/attached_files/r_96768/Total-Internal-Reflection.gif Think about the direction light bends when traveling from water into air. What happens when the exiting ray travels along the surface of the water? What happens at even steeper incident angles?
  9. Is there an incident angle where the light will exit along the boundary surface ( becomes This has a solution only if light is speeding up at the boundary (so and )!
  10. Optical Fibers
  11. Where did the pipette and test tube go? http://gr5.org/index_of_refraction/babywess.jpg https://webspace.utexas.edu/cokerwr/www/index.html/tubeinoil.JPG
  12. A full handout of this talk will be available on the web after this conference at http://courses.ncssm.edu/talks/conferences/ Thank you for coming!
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