Task 50203.
At a distance W m apart are two lamps emitting 15 and 50 Kd. Determine where to place the screen between the lamps, so that it had the same illumination on both sides.
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.
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