Sinhala proverbs and sayings. Folk wisdom

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Proverbs and sayings of the peoples of the world
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Encyclopedia of folk wisdom. Sinhala proverbs and sayings

Proverbs and sayings of the peoples of the world

Free library / Proverbs and sayings of the peoples of the world

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Sinhala proverbs and sayings

Everything is difficult for the poor.
Hunger knows no taste.
Make a chair from the rubble of a broken barn.
Secrets don't last long.
The dog will grab your sandals even if he becomes a king.
The fish that didn't catch is the biggest.
Teachers make mistakes too.
Good deeds are better than sweet speeches.

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A two-layer solar cell can turn up to 30% of the energy of sunlight into electricity.

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A semiconductor's ability to convert light into electricity is limited by its band gap. If the energy of the light quantum is less, there will be no current. If more - excess energy will go into heat. By capturing the more energetic violet-yellow quanta in one layer, and the less energetic red and infrared quanta in another, it will be possible to more fully utilize the light of the sun.

To capture violet-yellow quanta, EMPA engineers synthesized a thin layer of methylammonium lead iodide in the form of small crystals with a perovskite lattice. Perovskites have long attracted the attention of solar power engineers, but due to the fact that their crystals grow poorly, it was not possible to achieve a result that would allow them to think about introducing them into production. Now the intermediate organic layer built on the basis of C61 fullerenes helped. The perovskite layer on it turned out to be not only durable and flexible, but also transparent, transmitting the red part of the spectrum.

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