Question

2.When object moves closer to convex lens, the image formed by it shift (1) (a) away from the lens (b) towards the lens (c) first towards and then away from the lens (d) first away and then towards the lens​

Answer 1

Answer:

As object moves from infinity towards optical centre of the convex lens image is shifted away from its focal point and towards infinity.

Answer 2

When object moves closer to convex lens, the image formed by it shifts (a) away from the lens.

1. When an object is at infinity, the image is formed at the focus.
2. When the object is placed beyond the centre of curvature, the image will be formed between focus and centre of curvature.
3. When the object is placed at the centre of curvature, the image will be formed at the centre of curvature.
4. When the object is placed between the centre of curvature and focus, the image will be formed beyond the centre of curvature.
5. When the object is placed at the focus, the image is formed at infinity.

As seen from above, on moving the object closer to the convex lens, the image moves away from the lens.