Question

What is Abbe equation????????​

Answer 1

Answer:

kya hoard?............

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Answer 2

Abbe in order to ease in identification of lens quality devised an equation for numerical aperture. ... This number is found on all objective lenses. N.A. = n sin u. n = refractive index of medium. u = 1/2 the angle of light rays taken in when focused on the object.