Difference between Concave vs Convex Lens: Isn’t physics one of those subjects that almost every student is scared of? Well why not, given the complexity of ...

湖南省康复医院专家介绍，当我们举手、抬腿或转动脖子时，看似简单的动作背后，其实遵循着一条被称为“凹凸定律”（Concave-Convex Rule）的精密法则。这条定律揭示了关节面形状与运动方向的奇妙关联。 人体关节由凸面（如肩关节的肱骨头）和凹面（如肩 ...

In a ray diagram, a concave lens is drawn as a vertical line with inward facing arrows to indicate the shape of the lens.