Focal Points Made Easy
I recently posted about finding focal points, and the mathematical method seemed a bit confusing. I decided to explain it all in one simple picture, step-by-step.For those of you who really get into the mathematical realm of solar cooking you can download an excel spread sheet for calculating parabolic solar cooker focal points and energy out put; and there is a page in the same spreadsheet for Solar Oven Energy Output Calculations as well...the graph is in a zip file that you download to your computer
I think that once you walk through this one time, it will make complete sense. Good luck.
Solar Parabolic Focal Points Graph file