This is a cool video that briefly goes over the discovery of the true nature of light. It was produced by PBS Digital Studios for the YouTube Channel “Ir’s Okay To Be Smart“. As the video explains it took thousands of years for humans to finally unravel what light really is.
If you’re a photographer knowledge of light should be critically important to you. Even the word photograph itself derives from the Greek language that essentially translates to “drawing with light”. This video will not only give you a nice short history of our understanding of light, but it’s also a pretty good lesson on what light actually is and how it behaves.