Willebrord Snel (1580â1626) Netherlands. Although he discovered the law of refraction, a basis of modern geometric optics, in 1621, he did not publish it and only in 1703 did it become known when Huygens published Snell's law in Dioptrica..
MKDS: Heavy. R.O.B. (short for Robotic Operating Buddy) is an accessory for the Nintendo Entertainment System who has recently made appearances in a few Mario games. In Japan, it was known as the Famicom Robot, which was short for Family Computer Robot.
ROB in Mario Kart DS. R.O.B. is an unlockable character in the Nintendo DS video game Mario Kart DS (unlocked by completing all of the GPS levels). In the game he is the only character outside of the Mario series to appear. He is classified as heavy and thus is placed in the same category as Bowser, Donkey Kong and Wario.