Least distance of distinct vision_____________?
Correct answer: A. increases with increase in age
- A. increases with increase in age
- B. decreases with increase in age
- C. neither increases nor decreases
- D. becomes infinite after 60 years
Explanation
The least distance of distinct vision generally increases with age because the eye's lens loses elasticity and the ciliary muscles become less effective, a condition associated with presbyopia. The eye therefore cannot focus comfortably on objects as close as it could when young. The likely mistake is choosing b, which reverses the age-related change.
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About Optics
Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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