Question

a person suffering from short sightedness can read a book placed at a distance of 20 cm clearly the length of which nature and what focal length he will have to use in his spectacles to read a book placed at a distance of 25 cm​

Answer 1

Answer:

➡ Concave lens =

f = - 100

✍ He should use a concave lens of

- 100cm focal length to clearly read the book placed at 25cm away.

Explanation:

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