"Energizer Batteries, Flashlights, Battery Chargers, Lighting." Energizer Batteries, Flashlights, Battery Chargers, Lighting. N.p., n.d. Web. 17 Sept. 2015.
"History of Lighting - Development of Artificial Lighting." History of Lighting. N.p., n.d. Web. 17 Sept. 2015.
"TK16." Fenix Flashlights. (888) 775-9996, n.d. Web. 17 Sept. 2015
course package page 28 for refraction, and page 30 for TIR
Textbook page 406.
"History of Lighting - Development of Artificial Lighting." History of Lighting. N.p., n.d. Web. 17 Sept. 2015.
"TK16." Fenix Flashlights. (888) 775-9996, n.d. Web. 17 Sept. 2015
course package page 28 for refraction, and page 30 for TIR
Textbook page 406.