The central portion of a lens is wrapped in black paper as shown below. An object is placed at 90 cm with the centre of curvature at 40 cm. Find the number of images formed.

3 images

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1 image

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0 image

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Solution

The correct option is C
1 image

The same number of the image will be formed at the same place by the light rays passing from the top and bottom of the lens. The rays that were passing earlier through the black region are not passing now so the intensity of the image will be reduced.

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The central portion of a lens is wrapped in black paper as shown below. An object is placed at 90 cm with the centre of curvature at 40 cm. Find the nature of image formed.

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The central portion of a lens is wrapped in black paper as shown below. An object is placed at 90 cm with the centre of curvature at 40 cm. Find the number of images formed.

The correct option is C 1 image The same number of the image will be formed at the same place by the light rays passing from the top and bottom of the lens. The rays that were passing earlier through the black region are not passing now so the intensity of the image will be reduced.

The correct option is C
1 image

The same number of the image will be formed at the same place by the light rays passing from the top and bottom of the lens. The rays that were passing earlier through the black region are not passing now so the intensity of the image will be reduced.