Two point light sources S1 and S2 are located at a distance of 2d = 2 m from each other. On the perpendicular, restored in the middle of the line connecting the sources, a small area is located at an angle perpendicular to the perpendicular at a distance d = 1 m from this line (Fig. 143). At a = 15°, the illumination on both sides of the platform is the same and equal to 20 lux. Determine the luminous intensities I1 and I2 of the sources.

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