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Pupil

Amount of lig...

Question

Amount of light entering in human eye is controlled by:

A

Retina

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B

Cornea

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C

Pupil

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D

Eye lens

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Solution

The correct option is C
Pupil

Light enters into eye through an opening called pupil. The diameter of pupil can be altered by iris that is attached with it and thus the amount of light entering into eye is regulated.

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Question 1

Part of the eye which controls the entering of light is called
(a) iris
(b) cornea
(c) lens
(d) retina

Q. What are the functions of the cornea, iris, pupil, eye lens and retina?

Q. Which of the following controls the amount of light entering the eye ?
(a) ciliary muscles (b) lens (c) iris (d) cornea

Q. Fill in the following blanks with suitable words:
(a) Most of the refraction of light rays entering the eye occurs at the outer surface of the.............
(b) The part of eye sensitive to light is...................
(c) The part of eye which alters the size of the pupil is............
(d) When light is dim, the pupil becomes................
(e) The iris controls the amount of................entering the eye.
(f) The ciliary muscles control the shape of the ...............
(g) To bring light from a distant object to a focus on the retina of the eye, the convex eye-lens needs to be made..........
(h) To bring light from a near object to a focus on the retina of the eye, the convex eye-lens need to be made.......

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