Решение задачи по физике раздел 21 пункт 100 квантовая

100. Electric lamp 100 watt emits 3% of the energy in the form of visible light (λ = 550 nm) uniformly in all directions. How many photons of visible light falls into the pupil of the observer 1c (pupil diameter of 4 mm) at a distance of 10 km from the lamp?

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