Willebord van Roijen =]
Willebord van Roijen died on October 30th 1626. He was famous for figuring out how to measure the earth. He made contributions to trigonometry. He also has a law which is in optics, a relationship between the path taken by a ray of light in crossing the boundary or surface of separation between two contacting substances and the refractive index (q.v.) of each. This law was discovered in 1621 by the Dutch astronomer and mathematicinWillebrord van Roijen Snell.
Over all Willebord van Roijen was a very smart man and mathematicin. He made a lot of laws that some of us might not of figured out without him so I am very glade about what he had done. =]
