It may happen that in the hike, on the hunt, fishing or for other reasons in nature, you were without a lighter (we drop it somewhere, it ended fuel), and all the matches came out or wet and became unsuitable for consumption. How, in this case, dilute the desired fire to cook or warm up?
Revision of things from a tourist backpack
If someone from those present nearby believed glasses, then the lens from them could be used as a magnifying glass, and with its help, set fire to the paper, then sinters, dry birch bark, and then the branches. Then it would be possible to finally warm up, and cook food on his fire.
What can be used instead of lenses? Going hike, the tourist will surely capture the spoon. Here is a replacement, at least in shape. And if it is still a shiny spoon of chromonichel steel - then according to the collective ability of the sun's rays.
True, the curvature of the spoon is uneven: it is more in the transverse direction and less - in the longitudinal one. So that the curvature becomes uniform, it will smash it slightly in length and develop in width.
The degree of flexion-extension can be controlled to reflect its face in a spoon. When it becomes approximately uniform in any position of the spoon, the target can be considered, it is achieved. A modified spoon will be more or less to collect the rays of the sun at one point (focus), i.e. concentrate them.
Now we need a tin type material that would have the property easily flashes. It can also be found among things that the tourist will certainly take with him, going to the campaign. We mean a roll of toilet paper, it is better to use a piece of black or dark fabric.
As you know, the black surface absorbs heat to a greater extent than white. We need a dayless tourist bowler, or rather, soot from his bottom is a standard of black color, and this is what we need. Now we have everything to get to mining fire.
Getting of fire from the sun with a spoon
Watering the surface of the spoon to shine. This can be done any matter.
We start with the manufacture of a cloud of toilet paper. We tear off a piece from it, sufficient to twist the dense rod with a diameter of about 4 mm, rolling it several times between the palms in the same direction.
Then you prepare one side of the received rod from toilet paper to the ignition, more precisely, the receipt of smoldering red coal. To do this, we tear off the tip to form a somewhat flipstone.
In order for the tip of paper wicks better than the heat energy, I will apply a little soot on it with a hiking kit. Now no quantum of thermal energy, which hit the shock-up tip of our improvised tube, will not disappear.
Then we take an already upgraded spoon, and focusing the silence perpendicular to the sunshine. This will make it possible to concentrate the maximum amount of thermal energy at one point.
Next, we place the tip of the shredded soot of the tube from toilet paper in the focus of our improvised lens and hold both items fixed until the clutch lights up and the steady red corner is not formed.
You should not be afraid that the light will go out: toilet paper or fabric, once caloring, will not be lit, but to smooth, and long and stable.
For ignition, you can use dry grass.
Inflate.
Fire turned out.
