Share

The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem? - CBSE Class 10 - Science

ConceptRefraction at Spherical Surfaces and by Lenses Power of a Lens

Question

The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem?

Solution

The person is suffering from an eye defect called myopia. In this defect, the image is formed in front of the retina. Hence, a concave lens is used to correct this defect of vision.
Object distance, u = infinity = ∞
Image distance, v = – 80 cm
Focal length = f
According to the lens formula,

A concave lens of power – 1.25 D is required by the person to correct his defect.

Is there an error in this question or solution?

APPEARS IN

NCERT Solution for Science Textbook for Class 10 (2019 to Current)
Chapter 11: The Human Eye and the Colourful World
Q: 6 | Page no. 198
Solution The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem? Concept: Refraction at Spherical Surfaces and by Lenses - Power of a Lens.
S