For reading small letters with a lens

Question

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Answer 1

A $c o n c a v e l e n s$ 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.

A $c o n v e x l e n s$ produces real and virtual, erect and inverted, diminished, same sized and magnified image of the object, depending upon the position of the object on the principal axis.

When the object is placed between F and 2F of convex lens, an enlarged but inverted image of the object is formed. The magnified image makes it easier to read small letters but the inverted image is undesirable.

When the object is placed at a distance less than the focal length of convex lens, an enlarged and erect image of the object is formed, which makes it easier to read small letters.

Hence, the correct answer is OPTION D.

Answer 2

A

c o n c a v e l e n s

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.

A

c o n v e x l e n s

produces real and virtual, erect and inverted, diminished, same sized and magnified image of the object, depending upon the position of the object on the principal axis.

When the object is placed between F and 2F of convex lens, an enlarged but inverted image of the object is formed. The magnified image makes it easier to read small letters but the inverted image is undesirable.

When the object is placed at a distance less than the focal length of convex lens, an enlarged and erect image of the object is formed, which makes it easier to read small letters.

Hence, the correct answer is OPTION D.

For reading small letters with a lens

one has to keep a convex lens at a distance between F and 2F from the book.

one has to keep a concave lens at a distance less than the focal length from the book

one has to keep concave lens at a distance between F and 2F from the book

One has to keep a convex lens at a distance less than the an focal length from the book

None of these

A magnifying glass is what kind of lens, and where do where should I place the lens relative to the object to see an image larger than the object and right-side-up? ("F" stands for the focal length of the lens.)

What type of lens from the following would you have in your magnifying lens to read a page in small print ?

A manufacturer uses a concave lens instead of a convex lens in a magnifying glass by mistake. What will be the effect on the working of the lens?

Which of the following lenses would you prefer to use while reading small letters found in a dictionary ?

Which of the following lenses would you prefer to use while reading small letters found in a dictionary?

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