Question

One 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 the principal axis of a convex lens of focal
length 20 cm. The distance of the object from the lens in 15 cm. Find nature,
position and size of the image.​

Answer 1

Answer:

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Explanation:

Answer 2

Answer:

See is a lens is covered with black paper it produces the image but the brightness of the image will reduce in this case it will be half of brightness of original image.

now you can apply the direct formula to get the answer

image will be somewhat like this

Hope it helps