Obey Refraction It's The Law (Optics Snell's Law) Customized Photo Card
Showcase wry optical humor with this design featuring Snell's law, which says that the ratio of the sines of the angles of incidence and of refraction is a constant that depends on the media. Snell's law is also known as Descartes' law or the law of refraction. Make others do a double-take with any of these scientific truism refraction humor gifts that include the tongue-in-cheek saying "Obey Refraction It's The Law". No need to be a physics major to enjoy!