Решение задачи по физике раздел 42 пункт 6 оптика

6. The hole in the lamp housing closed flat glass milk size of 10x15 cm. Intensity I lamp in a direction making an angle φ = 60 ° to the normal, equal to 15 cd. Determine the brightness L glass.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)