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Two thin lenses of focal length …

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Two thin lenses of focal length +20 and -10 cm are kept in contact calculate focal length of combination

    • Posted by Akshat Bhatt 5 years, 3 months ago

    CBSE > Class 10 > Science
    • 2 answers

    Sanjay Parasharji 5 years, 3 months ago

    You have to calculate power with signs

    0Thank You

    Sanjay Parasharji 5 years, 3 months ago

    First calculate the power ot combination by adding these two powers and then calculate focal length.

    1Thank You

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