Mathematical and Physical Journal
for High Schools
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Problem P. 4348. (May 2011)

P. 4348. A tree on the opposite shore of a smooth surface of water of width of several tens of meters covers a house, which is behind the tree, such that only the top of the chimney of the house can be seen. Observing the image of the tree reflected from the surface of water the image of top of the chimney cannot even be seen. How can it happen?

(3 pont)

Deadline expired on June 10, 2011.

Sorry, the solution is available only in Hungarian. Google translation

Megoldás. A szemünk magasabban van, mint a tó víz szintje.


68 students sent a solution.
3 points:63 students.
2 points:2 students.
1 point:1 student.
0 point:2 students.

Problems in Physics of KöMaL, May 2011