– A lens (or an optical system) free from defects of spherical aberration and ……is called an aplanatic lens.
A. Coma
B. Astigmatism
C. Distortion
D. The curvature of the field
Answer:A
– A lens (or an optical system) free from defects of spherical aberration and ……is called an aplanatic lens.
A. Coma B. Astigmatism C. Distortion D. The curvature of the field