Mathematical and Physical Journal
for High Schools
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Problem P. 4695. (January 2015)

P. 4695. There is a 1 cm long operating electrical filament at a distance of 10 cm from a lens of optical power of 5 dioptres. The filament is perpendicular to the principal axis of the lens. A plane mirror, facing towards the lens, is placed to the other side of the lens, 20 cm from it. The mirror is also perpendicular to the principal axis of the lens. Where are the images of the filament and what is their size?

(4 pont)

Deadline expired on February 10, 2015.


Statistics:

37 students sent a solution.
4 points:Bekes Nándor, Horváth Botond István, Marosvári Kristóf, Molnár 128 Szilárd, Molnár Elizabet, Németh 017 András, Páhoki Tamás, Pázmán Előd, Trócsányi Péter, Varju Ákos, Vastag Balázs, Wiandt Péter.
3 points:Bartók Imre, Boldizsár Bálint, Bősze Zsófia, Bugár 123 Dávid, Gróf Tamás, Kalina József, Kormányos Hanna Rebeka, Mándoki László, Radnai Bálint, Stein Ármin, Sudár Ákos, Szántó Benedek, Szász Norbert Csaba, Szedlák Roland, Tóth Bence Tamás, Varga-Umbrich Eszter.
2 points:3 students.
1 point:5 students.
0 point:1 student.

Problems in Physics of KöMaL, January 2015