Question

Light from the Sun falling on a convex lens will converge at a point is called:

• A. Centre of curvature
• B. Focus
• C. Radius of curvature
• D. Optical centre

Answer 1

Answer:

B. Focus

• Light rays coming from a very distant object, such as the Sun, are considered parallel to the principal axis of the lens. • By definition, a convex lens is a converging lens that brings these parallel rays of light to a single point after refraction. This point is known as the principal focus, or simply the focus, of the lens.