Focal point

A focal point is the specific spot where light rays converge or meet after passing through a lens or mirror. In optics, it’s the point where parallel light rays are focused, creating a clear image or concentrated spot of light. For example, in a camera lens, the focal point is where the image of a distant object comes into sharp focus. It’s a fundamental concept that determines how sharply an image appears and helps in designing optical devices for clarity and precision.