Question

A parallel beam of light is incident on a converging lens parallel to its principal axis. As one moves away from the lens on the other side of the principal axis, the intensity of light

• A. first decreases and then increases
• B. continuously increases
• C. continuously decreases
• D. first increases and then decreases

Hint:

Intensity is maximum at the focal point where light is most concentrated.

Answer 1

The Correct Option is D

Step 1: Convergence
A converging lens focuses parallel rays at its focal point.
Step 2: Intensity Change
As you move toward the focal point, the light rays concentrate, so intensity increases.
Step 3: Divergence
After passing the focal point, the rays begin to diverge, causing the intensity to decrease.
Final Answer: (d)