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JEE Main & Advanced Physics Communication System / संचार तंत्र Question Bank Self Evaluation Test - Communication System

  • question_answer
    A laser beam is used for carrying out surgery because it       

    A)          is highly monochromatic

    B)   is highly coherent

    C) is highly directional

    D) can be sharply focused

    Correct Answer: D

    Solution :

    [d] Surgery needs sharply focused beam of light and laser can be sharply focused.


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