The intensity of light of two different waves λ1 and λ2 is measured directly in the liquid at the surface and at depth d. It was found, I01 = I02 at the surface and at depth d Id1 = 2Id2. To determine the depth at which the light intensity exceeds the wavelengths λ1 light intensity wavelength λ2 by 10 times.

Detailed solution shorthand terms, formulas, laws used in the decision, the withdrawal of the calculation formula and the response.

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