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60 W bulb and unknown wattage bulb: With the 60 W bulb at one end of the meter stick and the unknown at the other

60 W bulb and unknown wattage bulb: With the 60 W bulb at one end of the meter stick and the unknown at the other end, adjust the placement of the photometer until the brightness balanced from both sides of the photometer. Measure the distances between the bulbs and the photometer. Calculate the wattage of the unknown bulb. SHOW ALL YOUR WORK

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