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When the temperature dropped below -20 ° C last weekend, many people indulged in such cold pleasures. However, it is not always possible to perpetuate your experiments more effectively. In the field of tourism, G.Streikauskaitė issued several tips on what to do to take pictures of ice fireworks shows.
“We knew about this phenomenon a long time ago, and only this year did we learn its hard-to-pronounce name,” he smiled.
– We like to experiment with similar things, and even more to take photos. As the car did not start on the coldest morning of the year and we stayed home, we came up with the idea of using the cold for this experiment. “
G.Streikauskaitė assured that it is quite easy for everyone to create that effect: all you need is a kettle with hot water and the largest possible cup in hand. Well, of course, and freezing.
“Pouring water evenly in some way is spontaneous. It’s harder to find a place to stand, “he added.
Kaišiadoriškės also shared some tips on how to capture this rainbow of hot snow:
“It is best to take photos in front of the sun, the background must be darker (in the shade) and the spilled water must reach a place illuminated by the sun.
Although it is a matter of taste, depending on what you want to emphasize. It also looks beautiful against a blue sky background.
But if you want the effect of blazing fireworks, then the photographer had better stand in front of the sun. “
Why does boiling water freeze faster than it cools?
This phenomenon is called the Mpemba effect. The phenomenon was named after a student from Tanzania, Erastus Mpemba. Realizing that hot ice cream mixes freeze faster than cold ice cream, he tried to find the answer for himself for five years.
Finally, a university professor asked, but he also couldn’t explain why hot water freezes faster. In search of an answer, he wrote a scientific article in which the phenomenon is called the “Mpemba effect”.
The Technologijos.lt portal has written that it is speculated that the phenomenon of the Mpemba effect consists of several laws of physics, but so far this has not been proven. Hypothetical theories assume that the Mpemba effect can be caused by evaporation, convection, and subcooling, but many questions remain unanswered.
There may be several explanations. But one of them is that a hot plate exchanges energy more efficiently with freezers. Therefore, the contents of a warm container cools faster than a cold one.
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