1. There are two types of lens — (i) Convex lens (ii) Concave lens

    There are two types of lens —
    (i) Convex lens
    (ii) Concave lens

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  2. Go to tiwari academy website than follow these steps — 1) click on menu bar 2 ) go to maths solution 3 click on chapter 1

    Go to tiwari academy website than follow these steps —
    1) click on menu bar
    2 ) go to maths solution
    3 click on chapter 1

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    • 10