Question

$\small \pink{what \: is \: called \: principal \: axis?}$
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Answer 1

Answer:

Optics. a line passing through the center of the surface of a lens or spherical mirror and through the centers of curvature of all segments of the lens or mirror.

Explanation:

hope it helps you ..

Answer 2

Answer:

did but baat kese kroge aap mese yrr ya to whatsapp pe aao ni to instagram chlate ho?