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  3. 8th Class
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  5. Light

8th Class Science Light Question Bank Light Formative Objective Problems

  • question_answer
    Which of the following pairs of eye parts is responsible for controlling the amount of light entering into the eye?

    A)  Iris and pupil

    B)  Cornea and eye lens

    C)  Cilliary muscles and iris

    D)  Cilliary muscles and pupil

    Correct Answer: A

    Solution :

      The circular diaphragm in front of the eye lens is known as iris and the small opening in between the iris is known as pupil. The size of the pupil controls the amount of light entering into the eye. It is also true that the size of the pupil is controlled by the iris. Hence, both iris and pupil are responsible for controlling the amount of light entering into the eye. The correct answer is A.


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