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Standard XII
Physics
Question

For reading small letters with a lens
  1. one has to keep a convex lens at a distance between F and 2F from the book.
  2. one has to keep a concave lens at a distance less than the focal length from the book
  3. one has to keep concave lens at a distance between F and 2F from the book
  4. One has to keep a convex lens at a distance less than the an focal length from the book
  5. None of these

A
one has to keep concave lens at a distance between F and 2F from the book
B
None of these
C
one has to keep a convex lens at a distance between F and 2F from the book.
D
one has to keep a concave lens at a distance less than the focal length from the book
E
One has to keep a convex lens at a distance less than the an focal length from the book
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Solution
Verified by Toppr

A concave lens always produces virtual, erect and diminished images and the decrease in the size of the image depends on the position of the object.
∴ Concave lens will shrink the size of the already small letters.

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