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geb 4) [4] One million photons per second with a wavelength of 400nm are incident on a 1mm area of a black surface. Determine the

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geb 4) [4] One million photons per second with a wavelength of 400nm are incident on a 1mm area of a black surface. Determine the power absorbed by the surface. 147 5) A 3.0 mC charge is placed at the center of a regular triangular pyramid (with 4 equal triangular faces). Determine the electric flux through 1 face of the pyramid

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