Which lens curves outward and converges light rays?

Which lens curves outward and converges light rays?

• A. Convex lens
• B. Concave lens
• C. Plane mirror
• D. Convex mirror

Answer: (A)

Light behavior with lenses depends on their shape. An outward-curving lens is thicker in the middle, which bends incoming light toward the center and causes the rays to meet at a point on the opposite side. That convergence to a focal point is what makes a convex lens a converging lens. The other options don’t do that: a concave lens curves inward and makes light rays spread apart, behaving as a diverging lens. A plane mirror is flat and merely reflects light without bending it to a focus. A convex mirror curves outward but also causes divergence, producing a virtual image behind the mirror rather than a real converging focus. So the lens that curves outward and converges light rays is the convex lens.

Light behavior with lenses depends on their shape. An outward-curving lens is thicker in the middle, which bends incoming light toward the center and causes the rays to meet at a point on the opposite side. That convergence to a focal point is what makes a convex lens a converging lens.

The other options don’t do that: a concave lens curves inward and makes light rays spread apart, behaving as a diverging lens. A plane mirror is flat and merely reflects light without bending it to a focus. A convex mirror curves outward but also causes divergence, producing a virtual image behind the mirror rather than a real converging focus.

So the lens that curves outward and converges light rays is the convex lens.