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March 29, 2017

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The speed of all electromagnetic waves in
empty space is 3.00 × 108 m/s. What is the wavelength of visible light emitted at 7.2 × 108 MHz?
Answer in units of m

  • physics - ,

    frequency f = 7.2 × 10^8 MHz
    = 7.2*10^14 Hz

    Wavelength (m) = (speed of light, m/s)/(frequency, Hz)
    = 3.00*10^8/7.2*10^14 = 4.17*10^-7 m
    = 417 nm

    That correspnds to violet light

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