Least distance of distinct vision for normal and healthy people:
Correct answer: B. Decreases with an increase in age
- A. Increases with an increase in age:
- B. Decreases with an increase in age
- C. Neither increases nor decreases:
- D. Becomes infinite after 60 years:
Explanation
Explanation: The least distance of distinct vision (D) decreases with an increase in age. As people age, the flexibility of the eye lens decreases, making it harder to focus on nearby objects.
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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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