The nearest distance of distinct vision for the grandpa who is suffering from long-sightedness is 75 cm. He wishes to read a book that is held at 25 cm from the eye.

What is the nature lens required?

Convex Lens

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Plano Concave Lens

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Concave Lens

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Cylindrical Lens

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Solution

The correct option is A Convex Lens
The near-point of gradpa has receeded away. So, he is suffering from Hypermetropia. In such a defect, the image is formed beyond the retina for an object kept at 25 cm. So, the light rays need to be converged. This is achieved by a converging lens, i.e., convex lens.

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1. The near point of a hypermetropic person is 75 cm from the eye. What is d power of d lens required to enable him to read clearly a book held at 25 cm from the eye?

2. If the person in the previous problem uses spectacles of power +1.0 D wat is d nearest dist. of distinct vision for him?

Q. The near-point of a hypermetropic eye is

75 cm

from the eye. What is the power of the lens required to enable the person to read a book held at

25 cm

from the eye?

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The nearest distance of distinct vision for the grandpa who is suffering from long-sightedness is 75 cm. He wishes to read a book that is held at 25 cm from the eye. What is the nature lens required?

The nearest distance of distinct vision for the grandpa who is suffering from long-sightedness is 75 cm. He wishes to read a book that is held at 25 cm from the eye.

What is the nature lens required?