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Question
1) where is image formed in human eyes
2) how is amount of light that enters the eye controlled
3) how does eye focus on object that are near or at a distance
2) how is amount of light that enters the eye controlled
3) how does eye focus on object that are near or at a distance
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Solution
(1) Focused images are formed on the photoreceptors of the retina.
(2) The iris opens and closes
to control the amount of light entering the eye through the pupil. The pupil is the opening in the center of the iris where light enters the eye.
(3) The cornea (lens) focuses light rays on the retina. Muscles in the ciliary body enable the flexible lens to alter its shape and allow the eye to focus on objects at varying distances.
(2) The iris opens and closes
to control the amount of light entering the eye through the pupil. The pupil is the opening in the center of the iris where light enters the eye.
(3) The cornea (lens) focuses light rays on the retina. Muscles in the ciliary body enable the flexible lens to alter its shape and allow the eye to focus on objects at varying distances.
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