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Discussion :: Electric Illumination

  1. Which photometer depends for its operation on Inverse Square Law ?
    2. A.
    Guilds Flicker Photometer
    B.
    Lummer Brodhum Photometer
    C.
    Macbeth llluminometer
    D.
    Trotter Illumination Photometer

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    Answer : Option C

    Explanation :

    Macbeth llluminometer

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