The value of the least distance of distinct vision or near point is _ for a normal human eye.
Correct answer: B. 25 cm
- A. 20 cm
- B. 25 cm
- C. 10 cm
- D. 15 cm
Explanation
The near point of the eye is the minimum distance of the object from the eye, which can be seen distinctly without strain. For a normal human eye, this distance is 25 cm. The far point of the eye is the maximum distance to which the eye can see the objects clearly.
This question appeared on the UHS MDCAT 2014 paper, which you can sit online with every answer explained.
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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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