Which of the statements are true, If a convex lens is placed in water:

a. Its focal length increases.
b. Its focal length decreases.
c. Rays bend less when they move through lens.
d. There is no change in radius of curvature.

Choose the correct answer from the options given below:

a, c, d

The correct answer is Option (3) → a, c, d

(A) When the lens is in water, the refractive power of the lens decreases, leading to an increase in its focal length.

(C) In water, the difference in refractive indexes between the lens material and the surrounding material is less and thus the rays bend less.

(D) The radius of curvature of the lens depends upon its physical shape and remains unchange regardless of the medium.