21. Determine how to change the intensity of the narrow beam as it passes through the screen consists of two panels: 10 cm thick aluminum and iron - 5 cm. The coefficient of linear attenuation Alμ1 = 0.1 cm-1 for Feμ2 = 0,3 cm -1.

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