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    Question

    Which of the following correctly represents the order of

    increasing wavelength?
    A Gamma rays < UV < IR < Microwave Correct Answer Incorrect Answer
    B X-rays < Visible < IR < Radio waves Correct Answer Incorrect Answer
    C UV < Gamma < X-ray < Microwave Correct Answer Incorrect Answer
    D Radio waves < IR < UV < Gamma Correct Answer Incorrect Answer

    Solution

    The electromagnetic spectrum consists of various types of radiation arranged by wavelength or frequency. As we move from gamma rays to radio waves, the energy decreases , and wavelength increases . The general sequence from shortest to longest wavelength is: Gamma rays < X-rays < Ultraviolet (UV) < Visible light < Infrared (IR) < Microwaves < Radio waves This ordering is fundamental in physics and helps classify radiation types based on their penetration power and energy. Now applying this concept to the options:

    • Gamma rays have the shortest wavelength and highest energy.
    • X-rays follow next in increasing wavelength.
    • Ultraviolet lies between X-rays and visible light.
    • Infrared comes after visible light.
    • Microwaves and then radio waves have the longest wavelengths.
    Therefore, the correct answer is option (b).

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