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Mention one use of part of …

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Mention one use of part of electromagnetic spectrum to which a wavelength of 21 cm (emitted by hydrogen in interstellar space) belongs.

    • Posted by Devil ? 5 years, 3 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Gaurav Seth 5 years, 3 months ago

    (a)

     

    Radio waves have wavelengths of 1mm to 100km. Hence, 21cm lies at short wavelength end of radio waves.

     

    (b)

    Radio waves belong to the shortest wavelength in the electromagnetic spectrum

    1Thank You

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