Mathematical and Physical Journal
for High Schools
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Problem P. 4012. (October 2007)

P. 4012. A plane mirror is placed 25 cm away from a concave spherical mirror perpendicularly to the principal axis of the concave mirror. Where should we place a candle if the images of the flames formed by the two mirrors are at the same distances from the object? The radius of then concave mirror is 40 cm.

(4 pont)

Deadline expired on November 12, 2007.


123 students sent a solution.
4 points:64 students.
3 points:21 students.
2 points:26 students.
1 point:3 students.
0 point:3 students.
Unfair, not evaluated:6 solutions.

Problems in Physics of KöMaL, October 2007