The simple mathematics you can use to motivate one of the best and easiest physics demonstrations ever The Disappearing Beaker Hope Concannon The North.

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Presentation transcript:

The simple mathematics you can use to motivate one of the best and easiest physics demonstrations ever The Disappearing Beaker Hope Concannon The North Carolina School of Science and Mathematics 1219 Broad Street Durham, NC

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?

The Law of Refraction Notice the tie between this equation and the Law of Sines!

Light bends at a boundary between two materials with different optical densities. Some implications and activities using the Law of Refraction

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.

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? Total Internal Reflection

Optical Fibers

Where did the pipette and test tube go?

A full handout of this talk will be available on the web after this conference at Thank you for coming!