Making the lens
In this case, we make a biconvex lens.
Filling the lens with water is better as shown in the figure. After filling the lens, it is sealed on all sides, so as not to leak and do not pass the air inside.
All the lens is ready. you can shuffle small text, work with small objects and make a fire.
Date: 09.10.2018, 09:03 / Views: 94534
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