One half of a convex 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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Solution

Every part of a lens forms an image.

For formation of image we require only two light rays to converge.

Therefore, if the lower half of the lens is covered, it will still form a complete image.

However the intensity of the image will be reduced.

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Q. One half of a lens is covered with a black paper.
(a) Will this lens produce a complete image of an object?
(b) Is there any change in the intensity of the image?
(c) Draw a diagram to show the formation of the image by this lens.
(d) What will happen if we remove the black paper?
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One half of a convex lens is covered with a black paper. Will this lens produce a complete image of the object? Verify your answer experimentally. Explain your observations.

Every part of a lens forms an image. For formation of image we require only two light rays to converge. Therefore, if the lower half of the lens is covered, it will still form a complete image. However the intensity of the image will be reduced.

Every part of a lens forms an image.

For formation of image we require only two light rays to converge.

Therefore, if the lower half of the lens is covered, it will still form a complete image.

However the intensity of the image will be reduced.