Задача id423

Infrared rays are passed through a quartz plate 5 cm thick. The angle of incidence is zero. It is known that for infrared rays with a wavelength λ1 = 2.72 μm the linear attenuation coefficient is k1 = 0.2 cm-1, and for rays with λ2 = 4.50 - k2 = 7.3 cm-1. Determine the half-attenuation layers x1 and x2, respectively, for λ1 and λ2 and the relative change in the intensity of these rays after they pass through the quartz plate.

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