Question

A person A can clearly see objects between 25 cm and 200 cm. Which of the following may represent the range of clear vision for a person B having muscles stronger than A, but all other parameters of eye identical to that of A?
(a) 25 cm to 200 cm
(b) 18 cm to 200 cm
(c) 25 cm to 300 cm
(d) 18 cm to 300 cm

Answer 1

Answer:

(c)

Explanation:

since far point of normal eye is infinity but far point of person A is 200 but person B has far point more far than A which shows it is more near to infinity. Thus 25 cm to 300 cm represents more stronger ciliary muscles

Answer 2

Option (b) 18 cm to 200 cm, may represent the range of clear vision for a person B having muscles stronger than A, but all other parameters of eye identical to that of A

Explanation:

Stronger muscles allow a person to narrow the lens more than a normal person, improving the radius of curvature.

This would improve the sharpness of the convex lens and allow a personality to view closer objects more acutely.

However, seeing at distant objects, person B can do nothing more than person A to relax muscles and shorten the focal length.

Therefore, the most distant object visible to both would be the same.

Thus, the option (b) is the correct answer.