Solar Burner Tube!

cults3d

This Solar Burner Tube will collect sunlight and focus it into a small point at the smaller end of the tube. You will need to coat the inner surface with a reflecting material. For me, a reflecting tape worked well enough to melt black plastic. I guess the Solar Burner Tube can increase the sun's light energy density by a factor of 45. Warning: Never look into the focused light spot. Regular sunglasses will not prevent eye damage. You will need professional eye protection. Store it in a fireproof place like a metal box. First, check out "Maximum permissible exposure":http://en.wikipedia.org/wiki/Laser_safety The power density of the sun on Earth is about 0.1 W/cm^2. A maximum of 0.001 W is defined to be safe in Laser Class 2 (pupil's surface = 0.39 cm^2). You should never look directly into the sun, and you should never look at a 45 times stronger light source. Some calculations for version h40fa18: My Solar Burner Tube's effective area is A_top - A_bottom = 55.4 cm^2 - 10.2 cm^2 = 45.2 cm^2. Let's say the focus area size is about 1 cm^2. That's up to 4.52 W focused in 1 cm^2. Well, tell me if there are mistakes in the calculations.