Light Understanding has been completed

After 1 month of studying light, I can say I covered at least the fundamental part of light, there still is more to learn but the faith and patience will take care of that!!!! No doubt light is like the hidden thing on a work which just gives that artistic feeling, no doubt this has been the happiest and most enjoyable lecture I have ever done. Okay
Next Understand matter, will be about DESIGN ( Finally!!!!!!!!!!!)
so stay tune for updates.
Here is the final practices, feedback is welcome! for accelerate process.