A convex lens and a concave lens, each having same focal length of 25 cm , are put in contact to form a combination of lenses. The power in dipoter of the
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A thin convex lens of refractive index 1.5 has 20 cm focal length in air. If the lens is completely immersed in a liquid refractive index 1.6 , its focal length will be :
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![If the power of a lens is - 4.0 D, then it means that lens is a [MCQ]](https://d1avenlh0i1xmr.cloudfront.net/05591db6-f258-4062-8eb1-8480ea6a434c/slide1.jpg "If the power of a lens is - 4.0 D, then it means that lens is a [MCQ]")
If the power of a lens is - 4.0 D, then it means that lens is a [MCQ]
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Linear magnification produced by a convex lens can be:
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