Решение задачи по физике раздел 70 пункт 66 оптика

66. A schoolboy, reading a book without glasses, holds it at a distance of 40 cm. The distance of the best view of the normal eye is 25 cm. What is the optical power of the glasses that the student should wear?

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