Question

focus of phy give define of this​

Answer 1

Answer:

Focus is the point where light rays originating from a point on the object converge. The principal focus is defined as the point where a beam parallel to the principal axis appears to diverge converges from a point on the principal axis after passing through the lens.

Explanation:

Hope this answer helps you!

Answer 2

Answer:

focus of phy is the point where light rays originating from a point begin to converge