Question

what is principal focus ?​

Answer 1

Answer:

HEy Rohit sheoran_____☺

principal focus, focus the point on the axis of a lens or mirror to which parallel rays of light converge or from which they appear to diverge after refraction or reflection. 2 a central point of attention or interest.

HopE its help uh.....Jaat bro xD

Answer 2

The point on the principal axis where the incident rays parallel to the principal axis meet or appear to meet after reflection/refraction is called principal focus.