How high above the center of a circle of radius 10.0 in

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Reference no: EM131110625

Solve the given problems.

The illuminance from a point source of light varies directly as the cosine of the angle of incidence (measured from the perpendicular) and inversely as the square of the distance from the source. How high above the center of a circle of radius 10.0 in. should a light be placed so that illuminance at the circumference will be a maximum? See Fig. 27.51.

Reference no: EM131110625

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