The value of least distance vision for a normal eye is:
Correct answer: C. 25cm
- A. 20 cm
- B. 30cm
- C. 25cm
- D. 40cm
Explanation
This option suggests that the least distance of distinct vision for a normal eye is 25 cm. This is the correct value. The least distance of distinct vision refers to the minimum distance at which the human eye can focus on an object and see it clearly without any strain.
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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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