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JEE Main & Advanced Physics Wave Optics / तरंग प्रकाशिकी Question Bank EM Waves

  • question_answer
    The wavelength 21 cm emitted by atomic hydrogen in interstellar space belongs to

    A)            Radio waves                         

    B)            Infrared waves

    C)            Microwaves                         

    D)            g-rays

    Correct Answer: A

    Solution :

               Radio waves


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