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7th Class Science Light Question Bank Light

  • question_answer
    DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 A light ray makes an angle of reflection \[60{}^\circ ,\] when it reflects from a plane reflecting sheet. The glancing angle of reflection will be

    A)  \[60{}^\circ \]                      

    B)  \[30{}^\circ \]

    C)  \[45{}^\circ \]                      

    D)  \[90{}^\circ \]

    Correct Answer: B

    Solution :

    Glancing angle \[=90{}^\circ -\angle r\] \[=90{}^\circ -60{}^\circ =30{}^\circ \]


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