Question 9
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

The convex lens will form a complete image of an object, even if it’s one-half is covered with black paper. It can be understood by the following two cases.
Case I: When the upper half of the lens is covered.

In this case, a ray of light coming from the object will be refracted by the lower half of the lens. These rays meet at the other side of the lens to form the image of the given object, as shown in the above figure.
Case II: When the lower half of the lens is covered.

In this case, a ray of light coming from the object is refracted by the upper half of the lens. These rays meet at the other side of the lens to form the image of the given object, as shown in the above figure.

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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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Q. One half of a convex lens of focal length 10 cm is covered with a black paper. can such a lens produce an image of a complete object placed at a distance of 30 cm from the lens? Draw a ray diagram to justify your answer. A 4 cm tall object is placed perpendicular to its principal axis of a convex lens of focal length 20 cm. The distance of the object from the lens is 15 cm. Find the nature, position and the size of the image.

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Image Formation by Convex Lens

Standard X Physics

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Question 9 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.

Question 9
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.