Задача 50094.

The rate of minimum illumination animal E = 20 lux (incandescent). Determine the effect of light bulb suspended from a height h = 3m. Calculation generate with the proviso that the illumination creates 2nd lamp disposed at a distance l = 8m apart.

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