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.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Practise Optics
665 free Optics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 11 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Optics questions
Image of an object 5 mm high is only 1 cm high. Magnification produced by lens is__________________?
A convex lens gives a virtual image only when the objects lies_________________?
The minimum distance between an object and its real image in a convex lens is_____________?
Two convex lenses of equal focal length f are placed in contact the resultant focal length of the combination is______________?
For normal adjustment, length of astronomical telescope is______________?
Final image produced by a compound microscope is_____________?