Q
Which statement describes the aperture-to-radius-of-curvature relation assumed for a thin lens in elementary ray optics?
RRB JE (Stage-I)
17/12/2024 / Shift-I
2024
✓ Answer:
A
Aperture is much smaller than the radius of curvature
The source assumes a small aperture relative to surface curvature for paraxial optics. Strictly, thinness refers to lens thickness, while a small aperture is a separate approximation.