Aberration Hard
Spherical aberration minimized using:
Select the correct option:
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About This Question
- Subject
- physics
- Chapter
- optics
- Topic
- aberration hard
- Difficulty
- Hard
- Year
- 2025
Solution
Correct Answer:
Stopped-down aperture or aspheric lens
Spherical Aberration occurs because marginal rays (far from the axis) focus at a different point than paraxial rays (near the axis). Methods to minimize it:
- Using a stop to block marginal rays.
- Using an aspheric lens (specifically shaped surfaces).
- Using a combination of lenses with opposite aberrations.
- It is a defect of spherical geometry, not chromatic dispersion.
This hard difficulty physics question is from the chapter optics, covering the topic of aberration hard. It appeared in the 2025 exam.
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