资讯

BBC3 年
Convex and concave lenses
In a ray diagram, a concave lens is drawn as a vertical line with inward facing arrows to indicate the shape of the lens.
BBC2 年
Convex and concave lenses
In a ray diagram, a concave lens is drawn as a vertical line with inward facing arrows to indicate the shape of the lens.
Dezeen4 年
Concave Convex Mirror
Concave Convex Mirror has been created for the Alt Material exhibition, part of NGV's Melbourne Design Week 2020. The framework of Concave Convex Mirror is made of mild steel spun over a custom ...
PBS3 年
Two Types of Telescopes
In his workshop in Padua, Italy, he discovered that plano-convex and plano-concave lenses worked best—that is, lenses with a plane on one side and curved surfaces on the other. Then, drawing on ...
Nature10 年
Where is the sun?
When we interpret a shaded picture as a three-dimensional (3D) scene, our visual system often needs to guess the position of the light source in order to resolve a convex-concave ambiguity.