Physics
State the changes in the position, size and nature of the image when the object is brought from infinity up to the convex lens. Illustrate your answer by drawing the ray diagrams.
Answer
(i) When the object is situated at infinity, the position of the image is at F2. The image is real and inverted. It is highly diminished in size.
(ii) When the object is situated beyond 2F1, the position of the image is between F2 and 2F2. The image is real and inverted. It is diminished in size.
(iii) When the object is situated at 2F1, the position of the image is at 2F2. The image is real and inverted. It is of the same size as the object.
(iv) When the object is situated between 2F1 and F1, the position of the image is beyond 2F2. The image is real and inverted. It is magnified in size.
(v) When the object is situated at F1, the position of the image is at infinity. The image is real and inverted. It is highly magnified in size.
(vi) When the object is situated between lens and F1, the position of the image is on the same side . The image is virtual and upright. It is magnified in size.
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