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Q.

Is it true that if a person is able to see objects clearly only when they are lying at distances between 50 cm and 300 cm from his eye. His defect can be corrected with a concave lens?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
A person is able to see objects clearly only when they are lying at distances between 50 cm and 300 cm from his eye. He is suffering from nearsightedness. Myopia affects the ability to distinguish between nearby and distant objects. In this defect, the nearby objects can be seen clearly, but objects farther away appear blurry. It can be rectified by wearing eyewear with a concave lens of the right focal length.
 
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