Question

principal focus is
1.r
2.p
3.f​

Answer 1

Answer:

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

Explanation:

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.

Answer 2

Answer:

2.p

Explanation:

principal focus is

2.p your answer