A convex lens.
concave lens
convex
convex lens
The convex lens are the converging lens. The periphery of the convex lens is thinner & the center part is thicker. In other words, the convex lens are bulging at the center & thinner at the periphery.
Slimmer
A convex lens.
Center means middle. If you have a circle, the center is the middle.
Convex
thicker, thinner
concave lens
a disk that is thinner in the middle then on the outside
thinner in the center than around the edge
concave lens
convex
convex lens
The convex lens are the converging lens. The periphery of the convex lens is thinner & the center part is thicker. In other words, the convex lens are bulging at the center & thinner at the periphery.