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NEET-XII-Physics

08: Electromagnetic Waves

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  • #5
    A radio can tune in to any station in the 7.5 MHz to 12 MHz band. What is the corresponding wavelength band?
    Ans : A radio can tune to minimum frequency, ν1 = 7.5 MHz= 7.5 × 106 Hz

    Maximum frequency, ν2 = 12 MHz = 12 × 106 Hz

    Speed of light, c = 3 × 108 m/s

    Corresponding wavelength for ν1 can be calculated as:



    Corresponding wavelength for ν2 can be calculated as:



    Thus, the wavelength band of the radio is 40 m to 25 m.