On Monday, the sub went over how to use Snell's Law and assigned Part B of the Refraction Practice Problems. I reviewed this yesterday when I cam back and went through a couple more examples as well as looked at how to draw a refraction diagram. I assigned Assignment 3.1 as well as Part B and we went over this stuff today with everyone. Students handed in Assignment 3.1 and we went over the answers to Part B.
Today we moved on to look at critical angle and total internal reflection. Critical angle is a special incident angle where the refracted angle will be 90 degrees. If light tries to exit a substance at an angle greater than the critical angle, it wont be able to and it will just reflect around inside. This is called total internal reflection. They copied notes from slides 57-61 and worked on Part C of the Refraction Problems for the remainder of the class. We didn't get to the assignment in Period 3 but we will tomorrow. For Period 2, Part C is due tomorrow.
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