Reference

http://undsci.berkeley.edu/article/whatisscience_01

http://www.thefreedictionary.com/science

http://www.physicsclassroom.com/class/light/Lesson-1/Wavelike-Behaviors-of-Light

http://theory.uwinnipeg.ca/physics/light/node1.html

http://www.absorblearning.com/physics/demo/units/DJFPh064.html

http://global.britannica.com/EBchecked/topic/340440/light/258397/Characteristics-of-waves

http://www.pveducation.org/pvcdrom/properties-of-sunlight/properties-of-light

http://www.canon.com/technology/s_labo/light/001/11.html

http://www.ducksters.com/science/physics/properties_of_waves.php

http://www.physics.montana.edu/faculty/babbitt/Physics305/phsx305lec02.pdf