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A person can focus an object only when it lies within 200cm from him. Which spectacles ...

A person can focus an object only when it lies within 200cm from him. Which spectacles should be used to increase his maximum distance of distinct vision infinity
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  • A Convex lens
  • B Binoculars
  • C Concave lens
  • D Plane glasses
Correct Answer: Option C
Explanation:
A person with this condition is said to be short-sighted. Hence, to correct it, a concave lens is used for correction.

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