This presentation shows clearly how TIR occurs
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As your block is not a semi circle I'm sorry to say that there would therefore be visible refraction happening as the ray entered the block! great idea but incorrect!
Excellent. Very easy to integrate into my own presentation too. Thanks!
thanks this is simply great
Do check last slide though as pointed out by ASnitch
A nice simple powerpoint, but to be sure not to confuse the students, you would need to change the last slide slightly so that it follows the law of reflection.
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