The combined correction for curvature and refraction can be given as _______ Options: A . &nbspC = 14d²/6R B . &nbspC = 6d²/7R C . &nbspC = 7d²/2R D . &nbspC = 6d²/14R

The combined correction for curvature and refraction can be given as ______

Question

The combined correction for curvature and refraction can be given as _______

Options:

A . C = 14d²/6R

B . C = 6d²/7R

C . C = 7d²/2R

D . C = 6d²/14R

Answer: Option D
Answer: (d).C = 6d²/14R

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