From the powerful monochromatic point source (lambda =

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From the powerful monochromatic point source (lambda = 0.55 microns), emitting in the hemisphere with a luminous intensity of 6.83 * 10^5 cd, a beam of light falls at an angle of 30 ° on a polished plate of 20 mm in diameter. Determine the impulse obtained plate during 10 minutes. (The distance from the source plate 3 m, the reflection coefficient of 0.85).

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Task 50281. The solution formulas and the laws of recording used in the decision, drawing, calculation formula and the withdrawal response.
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