12th Class Physics EM Waves Question Bank MCQs - Electromagnetic Waves

  • question_answer
    Proper arrangement of Gamma rays. Microwave, IR wave and UV rays in ascending order of frequency is

    A) Gamma rays > UV rays > IR rays > Microwave

    B) Microwave > IR rays > UV rays > Gamma rays

    C) UV rays > Gamma rays > Microwave > IR   rays

    D) IR rays > UV rays > Microwave > Gamma rays

    Correct Answer: A

    Solution :

    Option [a] is correct                                  
    Explanation: Frequency range of Gamma rays: \[{{10}^{22}}-{{10}^{19}}\text{ }Hz\]
    Frequency range of UV rays: \[{{10}^{17}}-{{10}^{15}}\text{ }Hz\]
    Frequency range of IR rays: \[{{10}^{14}}-{{10}^{12}}\text{ }Hz\]
    Frequency range of Microwave: \[{{10}^{13}}-{{10}^{9}}\text{ }Hz\]


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