Question

Write in proper sequence the name of all the parts of the human eye through which the light rays coming from an object pass before they form an image on the retina.

Answer 1

The parts of the human eye through which the light rays coming from an object pass before they form an image on the retina are

Cornea -> Iris -> Pupil -> Eye lens -> Retina.

When light rays come from an object, the light first enters the cornea which is a thin membrane present on the front surface of the eyeball. Iris is present behind the cornea which controls the size of the pupil. The pupil regulates and controls the amount of light entering the eye. The eye lens forms an inverted real image of the object on the retina which contain number of light sensitive cells . These light sensitive cells get activated upon illumination and generate electrical signals. These signals are sent to the brain via the optic nerves. The brain interprets these signals and processes the information that we perceive.