Mathematical and Physical Journal
for High Schools
Issued by the MATFUND Foundation
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# Problem P. 4410. (January 2012)

P. 4410. On a sunny day, when there was no cloud on the sky, someone observed an interesting phenomenon. There was a plastic triangle shaped ruler next to the window on the table, and observing the ruler a pattern of coloured band was seen on it, similar to that of formed on the surface of oil on wet asphalt. a) Could this phenomena be the result of the interference of the reflected light-beams from the bottom and the top of the ruler, as in case of the oil-spot? b) If not, what might the explanation be?

(5 pont)

Deadline expired on February 10, 2012.

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

Megoldás. $\displaystyle a)$ Nem, a vonalzó vastagsága miatt.

$\displaystyle b)$ Az égbolt fényének polarizáltsága, a kettőstörés és a visszavert fény polarizáltsága játszik szerepet a jelenségben.

### Statistics:

 45 students sent a solution. 5 points: Agócs Fruzsina, Albrecht 963 Gábor, Czipó Bence, Filep Gábor, Gábriel Anna, Havasi 0 Márton, Juhász Péter, Kaszás Bálint, László 002 Dávid, Papp Roland, Sárvári Péter, Szigeti Bertalan György. 4 points: Antalicz Balázs, Bodor Bálint, Kollarics Sándor, Koncz Gabriella, Kúsz Ágnes, Laczkó Zoltán Balázs, Nagy Lajos, Szabó 928 Attila, Szilágyi 585 Dezső, Tilk Bence. 3 points: 9 students. 2 points: 4 students. 1 point: 6 students. 0 point: 3 students. Unfair, not evaluated: 1 solutions.

Problems in Physics of KöMaL, January 2012