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converging lensesclick to hear

Thicker in the center than on the edges; they cause parallel light rays emanating from an object to converge onto the same point.
converging lenses plano-convex lens positive meniscus biconvex lens convex lens

plano-convex lens click to hear

Lens with one flat side and one convex side (bulging outward).

positive meniscus click to hear

Lens where the concave side (curving inward) is less pronounced than the convex side (bulging outward).

biconvex lens click to hear

Lens with both faces bulging outward.

convex lens click to hear

Lens with one side bulging outward; the greater the bulge, the more the light rays converge.