Question

write two rules of refraction of light through the convex lens

Answer 1

Rules for obtaining images formed by convex lens

Rule 1: A ray of light which is originally parallel to the principal axis passes through the focus after refraction through the lens.

Rule 2: A ray of light passing through the optical centre of the convex lens does not bent after refraction but goes straight.

Answer 2

Rules for obtaining images formed by convex lens. In convex lens, the image is always formed at a point where at least two refracted light rays meet. Rule 1: A ray of light which is originally parallel to the principal axis passes through the focus after refraction through the lens.