This is a seriously informative and well written post :O

I also like your composition, and choice of words. It's well put together. Also learned a few things about light I didn't know before. Seems like you focused almost exclusively on scientific elements, which is cool, seeing as this is a SteemSTEM contest.

Good work man :D
Keep makin' stuff like this, and happy Steeming!

P.S: Good luck in the competition, fellow competitor =)