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photometer

n.
1.measuring instrument for measuring the luminous intensity of a source by comparing it (visually or photoelectrically) with a standard source
2.photographic equipment that measures the intensity of light

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    Idiom of the Day

    out of reach
    not close enough to be reached or touched, unattainable
    The books on the bookshelf were out of reach and I could not get the dictionary easily.



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