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Try this. i. Try to read a book keepin...

Try this.
i. Try to read a book keeping it very far from your eyes.
ii. Try to read a book keeping it very close to your eyes.
iii. Try to read a book keeping it at a distance of 25 cm from your eyes. At which time you see the alphabets clearly? Why?

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The alphabets can be read clearly by keeping the book at a distance of approximately 25 cm from the eyes. This is because for a normal eye, minimum distance at which an object can be seen most dis!inctly without strain is about 25 cm in front of the eye. The object placed at a distance less or more than 25 cm appears blur.
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