Certified Ophthalmic Technician (COT) Practice Test 2025 - Free COT Practice Questions and Study Guide

The term 'convergence' in optics specifically refers to the process by which light rays are brought together to meet at a focal point. When light rays from a point source travel through a lens or are reflected off a curved mirror, they can converge, meaning they come together at a single point. This action is critical in various optical devices, including cameras, microscopes, and the human eye, where focusing light is essential for clear image formation.

In contrast, the other terms relate to different optical phenomena. Spreading of light rays refers to divergence, where the rays move away from one another. Reflection involves light bouncing off surfaces rather than coming together. Bending of light rays typically describes refraction, which occurs when light passes through different media and changes direction but does not specifically convey the idea of bringing light to a point. Thus, convergence accurately captures the concept of light rays meeting at a single spot, highlighting its significance in optical systems.