James Clerk Maxwell He calculated the speed of light. He also told people that you could take pictures with color.
What he did • He was known for calculating the speed of propagation of an electromagnetic field as approximately that of the speed of light.http://en.wikipedia.org/wiki/Electromagnetic_theory. He also wrote a paper about color and color blindness and wrote a lecture that they could use color for pictures and other people.
Location He was born in Edinburgh, Scotland. Then he moved to England and started his studies.
Time period • He lived in 1831 to 1879 he was only 48 when he died.
How he has changed the world • We would not be able to tell how far away star s are and there would not be light years. If he didn’t find the speed of light.