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What is the wavelength of waves transmitted by an AM radio station operating at a frequency of 840 kilohertz?

Calculate the energy of a photon whose frequency is 2450 megahertz

What is the difference in energy for a photon of ultra-violet radiation, wavelength 319 nm and a photon of ultra-violet radiation, wavelength 238 nm

  • science -

    The speed of light is c = 3*10^8 m/s

    (1) wavelength = c/frequency
    = 3*10^8/840*10^3 = ___ m
    (2) E = h*frequency
    h is Planck's cosntant. Look it up.
    (3) E = h*c/(wavelength)
    Calculate it for both wavelengths and take the difference.

  • science -

    thankss

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