Задача 50077.

Pressure light with wavelength of 400 nm, normally incident onto the black surface is p = 2 nPa. Determine the number of photons N, falling during t = 10 c of the square S = 1 mm ^ 2 of the surface.

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

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