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

These lenses are created through laser-ablation and mechanical polishing, resulting in high-quality bi-concave lenses that ... using planar compound refractive lenses (PCRLs).

A refractive index of 2.42 indicates that diamond ... Question 3: Find the power of a concave lens of focal length 2 m Answer: Power of a lens is a measure of how strongly it can bend light.