suppose that you look into the photometer's eyepiece and the fluorescent disks appear to be equal in intensity. if the distance between the photometer to lamp 1 is 400 mm, the distance between the photometer to lamp 2 is 200 mm, and the intensity of lamp 2 is known to be 15 candelas, what is the intensity of lamp 1? . 75 candelasb. 80 candelasc. 45 candelasd. 60
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