Answer-If a near-sighted person cannot see objects clearly beyond 1.2 meters, what should be the focal leng...

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Sol. For a person with myopia near-sightedness, the focal length of the concave lens should equal the farthest distance at which the person can see clearly. Here, the required focal length is 1.2 meters.   Information Booster   Myopia is corrected using a concave lens.  It occurs due to an elongated eyeball or a steep cornea.  Concave lenses help focus light farther away.  Commonly develops during childhood.  Proper eyeglasses or contact lenses help correct the vision.    ---    1.5 m Suitable for moderate myopia.   2.2 m Can apply to hyperopia cases.    2.5 m Used in severe vision defects.

If a near-sighted person cannot see objects clearly beyond 1.2 meters, what should be the focal length of the concave lens required for correction?

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