In using a photometer to measure the candle-power of a test lamp the distance of a standard 50 candela lamp from the photometer was 2 m and at balance the test lamp was 1 m from the photometer. Calculate the candle-power of the test lamp
In using a photometer to measure the candle-power of a test lamp the distance of a standard 50 candela lamp from the photometer was 2 m and at balance the test lamp was 1 m from the photometer. Calculate the candle-power of the test lamp
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In using a photometer to measure the candle-power
of a test lamp the distance of a standard 50 candela
lamp from the photometer was 2 m and at balance
the test lamp was 1 m from the photometer.
Calculate the candle-power of the test lamp
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