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A point source lamp has a luminous intensity of 2000cd. a. What is the illuminance at 2m distance from the lamp? b. What is the

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A point source lamp has a luminous intensity of 2000cd. a. What is the illuminance at 2m distance from the lamp? b. What is the illuminance at 8m distance from the lamp? c. The lamp is fixed 2m above the centre of a circular table which has a radius of 1.5m. Ignoring any reflected light, what is the illuminance at the edge of the table

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