Where must an object be placed in front of a converging lens so that the image formed may be
at infinity

Explanation

To determine where an object must be placed in front of a converging lens (also known as a convex lens) so that the image formed is at infinity, we can follow these steps:

### Step 1: Understand the Lens Formula
The lens formula relates the object distance (u), the image distance (v), and the focal length (f) of the lens. The formula is given by:
\[ \frac{1}{f} = \frac{1}{v} - \frac{1}{u} \]

### Step 2: Identify the Condition for Image at Infinity
When the image is formed at infinity, the image distance (v) approaches infinity. In mathematical terms, this means:
...