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     EduGorilla 
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    Select Question Language :


    If three lenses of powers P1, P2 and P3 respectively, are placed in close contact with each other, the total power of their combination (P) will be _____.

    Options :-

    1. P1 – P2 – P3
    2. P1  P2  P3
    3. P1 + P2 + P3
    4. (P1 + P2)  P3
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