They have different curvatures, one curves in and the other curves out.
concave
The convex lens bulges out at the center, while the concave lens bulges in at the center. The convex lens magnifies, while the concave lens reduces.
Convex bulges outward (thicker in the center than the edge)Concave bulges inward (thinner in the center than the edge)Convex lenses magnify when you look through then, concave lenses make things look smaller.You can focus a distant object to a point with a convex lens (the image will be upside down).
It can be convex or concave.
Convex and concave
concave is inward, convex is outward concave is inward, convex is outward
convex and concave
concave concave
The mold for a concave object is convex.The mold for a convex object is concave.
we polish concave and convex with alimunium
Concave
concave=in convex=out