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  1. Measurement of optical absorption of a solution is disturbed by the additional stray light falling at the photo-detector. For estimation of the error caused by stray light the following data could be obtained from controlled experiments. 
    Photo-detector output without solution and without stray light is 500 μW. 
    Photo-detector output without solution and with stray light is 600 μW. 
    Photo-detector output with solution and with stray light is 200 μW. 
    The percent error in computing absorption coefficient due to stray light is
    2. A.
    12.50
    B.
    31.66
    C.
    33.33
    D.
    94.98

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    Answer : Option B

    Explanation :

    -NA-

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