A person with weak eyesight use spectacles. What type of lens is used in the spectales if a person is not able to see nearby objects (due to image formed behind the retina) and when a person is not able to see far-off objects (due to image formed ahead of the retina)? ( Hint:use the property of lenses to converge or diverge the rays of light.)
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Answer:
concave lens for person not able to see nearby objects
convex lens for person not able to see far objects
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Answer: Diverging lens
Explanation: Correction of nearsightedness requires a diverging lens that compensates for the overconvergence by the eye. The diverging lens produces an image closer to the eye than the object, so that the nearsighted person can see it clearly.
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