How can you be sure if the probe you are about to send to the Mars won't burn out? Where can you check this?
Or how can you make a "sun knife" that is able to cut any materials and even evaporate metals?
Or how can you generate the temperature of 4 000 C from sunlight? All this - just by means of a sunbeam!
Answers to these questions can be obtained at the place few know about. You are invited to visit this place right now.