When ray is incident parallel to the principal axis of a convex lens then the refracted ray will pass throught:

Correct option is D

The correct answer is (D) principal focus.

• When a ray of light is incident parallel to the principal axis of a convex lens, the refracted ray will pass through the principal focus.

Explanation:

• Refraction is the redirection of a wave as it passes from one medium to another.
•  In the case of light, refraction occurs when a ray of light passes through a convex lens, and the refracted ray meets at a single point on the principal axis of the lens.
•  This point is called the principal focus of the lens.