Ad: Obey Refraction It's The Law (Snell's Law Physics) Drink Pitcher
Optical physics humor featuring Snell's law -- also know as the law of refraction. No matter where you are or what you do you'll enjoy the geek physics saying "Obey Refraction It's The Law" on any of these educational scientific gifts! myPhysics
#obey #refraction #DrinkPitcher
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