Task 40911.
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It is necessary to set the thickness of the layer of material, weakening the intensity of monochromatic light twice. The coefficient of linear absorption of the substance is 0.69 m ^ -1.
Detailed solution with a short recording conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
If you have any questions about the decision to write. I try to help.
If you have any questions about the decision to write. I try to help.