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    Question

    Which electromagnetic wave has the longest

    wavelength?
    A X-rays Correct Answer Incorrect Answer
    B Gamma rays Correct Answer Incorrect Answer
    C Microwaves Correct Answer Incorrect Answer
    D Radio waves Correct Answer Incorrect Answer

    Solution

    In the electromagnetic spectrum, wavelength increases from gamma rays → X-rays → ultraviolet → visible light → infrared → microwaves → radio waves. Radio waves have the longest wavelength.

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