Question

What is focus???????​

Answer 1

Answer:

When a person is focused on something, they're paying attention to it. When a camera lens or your eyes are focused, they've made the adjustments needed to see clearly

Answer 2

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In geometrical optics, a focus, also called an image point, is a point where light rays originating from a point on the object converge. Although the focus is conceptually a point, physically the focus has a spatial extent, called the blur circle.