IYPT 2013, Задачи на турнира — Задача 7. Hearing light

Problems for the 26th IYPT 2013

Епиграф

There are more things in heaven and earth, Horatio,
Than are dreamt of in your philosophy
Shakespeare

Условие

Drawing of a light bulb shining yellow rays onto a transparent jar lying on its side; the lower half of the jar's inside is dark (soot-coated) and the blue cover at the right end has a small hole in its centre.

Coat one half of the inside of a jar with a layer of soot and drill a hole in its cover (see figure). When light from a light bulb connected to AC hits the jar’s black wall, a distinct sound can be heard. Explain and investigate the phenomenon.

Решение

Внимание: Непълно решение

Това е открита изследователска задача — официални решения не се публикуват.

Оригинал в Архива: 2013.pdf