1. We did Christmas glasses and some glasses that were dark on on eye and transparent on the other eye so when we swung a golf ball back and forth like a pendulum, it appear like it was going in circles. And Red and Blue framed glasses that the red only let red through so anything blue liked black and vice-versa for the blue lens anything red looked black.
2. We finished the Let There Be Light side of home sheet that you need to know for Wednesday's test but I am not collecting the worksheet.
2. We finished the Let There Be Light side of home sheet that you need to know for Wednesday's test but I am not collecting the worksheet.
If you missed today:
1. Here is a video showing you what TIR is.
After watching the above video, think about it, if the light is going from water into air it will bend away from the normal and the most it can possibly bend is 90 degrees (right along the surface). Once you get at this point (called the critical angle) all the light can do now is reflect. n sub i times SIN I = n sub r times SIN R so if R equals 90 degrees the SIN 90 = 1 thus the critical angle for any substance will always be C = INV. SIN (n sub i / n sub r) where i has to have a greater index of refraction (like water here where n = 4/3) than r (like air here where n = 1).
2. An example of TIR (Total Internal Reflection) called the pissing bucket where as water shoots out of a bucket the laser light is caught in the water and curves and falls with the water by TIR.
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