Question

A convex lens is placed in water, its focal length:

• A. Increases
• B. Decreases
• C. Remains the same
• D. Doubled

Answer 1

Answer:

A. Increases

• Convex lens
•  convex lens is made by joining two spherical surfaces in such a way that it is thicker at the centre.
• Its thickness gradually reduces as we move towards the edge.
• A convex lens has the ability to converge the light rays to a point that are incident on it.
• it is called a converging lens.