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Q.

Is this true that a convex lens is used to read the small letters in a dictionary?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
A virtual, erect, and magnified image is formed if an object is kept between the focal length and the convex lens. This is because the power of the lens is inversely proportional to the focal length of the lens. So, for larger magnification, the focal length of the lens should be small. That’s why a convex lens of a smaller focal length will be used to read small letters in a dictionary.
 
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