Question

Air bubble in water behaves like a

• A. Converging lens
• B. Plano convex lens
• C. Diverging lens
• D. None

Answer 1

The Correct Option is C

To solve the problem, we need to determine how an air bubble in water behaves optically.

1. Understanding the Refractive Index Difference:
Air has a lower refractive index than water. So when light travels from water (denser medium) into an air bubble (rarer medium), it diverges away from the normal.

2. Nature of Lens Behavior:
A diverging lens causes parallel rays of light to spread apart after passing through it. Since the air bubble causes light rays to diverge when they enter and exit due to the curved boundary and refractive index difference, it behaves like a diverging lens.

3. Conceptual Analogy:
Just like a concave lens diverges light in air, an air bubble in water also diverges light due to the surrounding denser medium (water).

Final Answer:
An air bubble in water behaves like a Diverging lens.