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  • One half of a concave lens is covered with a black paper. Will this lens produce  a complete image of the object? Verify your answer experimentally. Explain your observations.

One half of a concave lens is covered with a black paper. Will this lens produce  a complete image of the object? Verify your answer experimentally. Explain your observations.

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Yes, a concave lens will still form a full image of the object even when one half is covered with black paper.

In order to check whether a concave lens still creates a full image when half of it is covered, place the lens on a stand and insert a light source, e.g., a candle, in front of it. Having observed the image with the full lens, cover half, and conducted the test again. The image will still be formed, though it will be weaker, since the exposed half of the lens will still refract light. The image will still be virtual, smaller, and erect. This will prove that the lens will still form a complete image even with a half cover.

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Divya Sharma

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