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Q.

Which lens would you prefer to use while reading small letters from a dictionary?


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a

Convex

b

Concave

c

Bifocal

d

None of these 

answer is A.

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Detailed Solution

[13]
Concave lenses would be prefered to use while reading small letters from a dictionary.
Here, we can say that a basic microscope can also be made with a convex lens. The object is held between the focal length and the mirror, creating a virtual, erect, and enlarged image. A smaller focal length provides greater power and is appropriate for higher magnification. As a result, a convex lens with a focal length of  5 cm is recommended.
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