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2 thin lenses of power +5D …

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2 thin lenses of power +5D and -2.5d are in contact. What is focal length of combination.

    • Posted by Kamlesh Kumar 6 years, 3 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Disha Verma 6 years, 3 months ago

    D=5-2.5= 2.5D. f= 1/2.5D =0.4 m= 4cm

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