Question

what is ment by focal length

Answer 1

hey mate,

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The principal focal length of a lens is determined by the index of refraction of the glass, the radii of curvature of the surfaces, and the medium in which the lens resides.

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hope this help!!!!!

Answer 2

#RAM RAM ji ❤^_^



ĀNSWĒR ⏬⏬


⭐FOCAL LENGTH (f) ▶

It is the distance between pole and the Focus (F)

▶F=R/2


THANKS ✌☺


#NAVI ❤ HARYANVI ♠