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8th Class Science Light Question Bank Light HOTS Objective Problems

  • question_answer
    Which part of the human eye contracts and relaxes in order to adjust the focal length of the lens?

    A)  Iris                                        

    B)  Pupil

    C)  Blind spot                          

    D)  Ciliary muscles

    Correct Answer: D

    Solution :

      To accommodate near and far vision, the ciliary muscles of the eye contract and expand respectively. This contraction and expansion is to respectively decrease and increase the focal length of the lens. The correct answer is D.


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