Question

A point object is kept at the focus of a convex lens

• A. We will get a parallel beam of light
• B. We will get a convergent beam of light
• C. We will get a divergent beam of light
• D. Can't comment

Answer 1

The correct option is A We will get a parallel beam of light

If the point source of the light is kept at the focus; we get a parallel beam of light. As a parallel beam, falling on a convex lens gets converged at the focus; we can think from the principle of reversibility.