IYPT 2011, Задачи на турнира — Задача 11. Fingerprints

24th IYPT (2011)

Заглавие в източника

Source: Problems for IYPT 2011 (iypt.org, July 17, 2010)
Selected at the IOC meeting in Gössing on July 16—17, 2010
Reference Kit for 2011 (final edition, July 29, 2011) →
Exemplary solutions for 2011 →

Условие

Fill a glass with a liquid and hold it in your hands. If you look from above at the inner walls of the glass, you will notice that the only thing visible through the walls is a very bright and clear image of patterns on your fingertips. Study and explain this phenomenon.

Решение

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Оригинал в Архива: 2011.txt