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Question

The old unit of intensity of light is:


A

inch candle

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B

yard candle

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C

foot candle

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D

none of the above

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Solution

The correct option is C

foot candle


Explanation for correct option:

  1. A foot-candle is an old unit of measurement of light intensity.
  2. One foot-candle is defined as enough light to saturate a one-foot square with one lumen of light.

Hence, the correct answer is option (C).


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