Question

When an object approaches a convex lens from infinity, the image formed by it shifts ______.

Options

• away from the lens

• towards the lens

• first away and then towards the lens

• none of these

Answer 1

When an object approaches a convex lens from infinity, the image formed by it shifts away from the lens. 

Explanation:

When the object is at infinity, the image is at the principal focus. As the object approaches the lens, the image shifts progressively away from the focus and away from the lens towards infinity.