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If the distance from the Earth to the moon is 3.84 x 105 km. How long would it take a radio wave with wavelength 413.8 m to travel from Earth to the moon?

C=(lanbda)v & E=(h)v

  • Chemistry -

    You don't need either of these equations.
    The speed of the radio wave is 3E8 m/s. You have a distance of 3.85E8 meters (note I converted from km to m).
    distance = rate x time.
    You have distance, you have rate (3E8 m/s), solve for time in seconds.

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