making a very powerful sun beam
I have a question and perhaps you could be of help to me, So my question is , is it possible to use cheap Mylar blankets(parabolic form) to concentrate the sun light, so as it would be able to cut through metal. My idea is to use 3 Mylar sheets each 1m square which will reflect the light towards another one which will work as a collector and then further concentrate the light to about half a millimeter. Doing the math (0.5mm²/3m²) is more than 16 million (ok there will be a lot of loss , lets say 50 percent). The question is, is this worth trying cause i don't want to waste time and money on this. So if someone knows why this wont work , it would be very helpful.
thanks in advance