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Standard X
Physics
Crystalline Lens
Focal length ...
Question
Focal length of human eye lens is about _____________.
A
2.5 m
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B
2.5 cm
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C
2.5 mm
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D
25 cm
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Solution
The correct option is
B
2.5 cm
The focal length of the human eye lens is 2.5 cm.
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Similar questions
Q.
The focal length of a normal eye-lens is about
(a) 1 mm
(b) 2 cm
(c) 25 cm
(d) 1m
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The ciliary muscles can change the focal length of the eye lens. Find the ratio of focal lengths of the eye lens when it is focused on two different objects, one at a distance of 2 m and the other at a distance of 1m. The diameter of normal eye is 2.5 cm.
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