Question

Why is a normal eye not able to see clearly the objects placed at 10 cm​

Answer 1

Answer:

To see closer object, ciliary muscles, must decrease the focal length of eye lens. ... Due to this, a normal eye is not able to see clearly the objects placed closer than 25 cm. This distance at which objects can be seen is clearly, is called the least distance of distinct vision or the near point of the eye.

Answer 2

HIII......

THERE IS YOUR ANSWER.....

THE NORMAL EYE HAVE A SPECIALISED MUSCLE WHICH CAN ABLE TO CHANGE THE FOCAL LENGTH OF THE CRYSTALLINE LENS BUT THIS MUSCLE HAS CERTAIN LIMITS UNDER WHICH THEY CAN CONTROL THE FOCAL LENGTH OF THE CRYSTALLINE LENS. THE MAXIMUM LIMIT OF THE MUSCLE  UPTO INFINITY AND THE MINIMUM LIMIT IS 25cm.

SO A OBJECT PLACED UNDER THIS LIMIT CAN EASILY BE SEEN BY THE EYE BUT WHEN THE OBJECT PLACED AT A DISTANCE LESS THAN 25cm FROM THE EYE CANT CLEARLY SEEN BY THE EYE THATS WHY OBJECT PLACED AT 10cm CANT BE SEEN BY THE NORMAL EYE.

HOPE   ITS   HELP U.........