– If an extended object in the form of a plane surface is placed in front of a convex lens, its image will not be a flat one but will be a curved surface. This type of defect is called ….
A. Coma
B. Distortion
C. Astigmatism
D. The curvature of the field
Answer:D
– If an extended object in the form of a plane surface is placed in front of a convex lens, its image will not be a flat one but will be a curved surface. This type of defect is called ….
A. Coma B. Distortion C. Astigmatism D. The curvature of the field