Which one of the following statements concerning electromagnetic waves is false? O Electromagnetic waves carry energy. O Lower frequency electromagnetic waves can be produced by oscillating circuits. O X-rays have longer wavelengths than radio waves. O In vacuum, all electromagnetic waves travel at the same speed. O They consist of mutually perpendicular electric and magnetic fields that oscillate perpendicular to the direction of propagation.Adistant space probe is programmed to emit a radio signal toward Earth at regular time intervals. One such pulse arrives on Earth 6.92 s after it is emitted from the probe. What is the approximate distance from the Earth to the probe? 0 8.76 x 109 m 0 3.50 X 1010 m 0 2.08 X 109 m 0 6.94 x 109 m 0 7.40 x 1010 m Which one of the following statements concerning the energy carried by an electromagnetic wave is true? O The energy is carried only by the magnetic field. O The energy is carried equally by the electric and magnetic fields. O More energy is carried by the electric field than by the magnetic field. O More energy is carried by the magnetic field than by the electric field. O The energy is carried only by the electric field.Which one of the following statements concerning the wavelength of an electromagnetic wave in a vacuum is true? O The wavelength is inversely proportional to the speed of the wave. 0 The wavelength is directly proportional to the frequency of the wave. 0 The wavelength is independent of the speed of the wave for a xed frequency. 0 The wavelength is the same for all types of electromagnetic waves. 0 The wavelength is inversely proportional to the frequency of the wave. The amplitude of the electric field component of an electromagnetic wave is increased from E to 3E. What is the corresponding change in the intensity of the wave? O The intensity decreases by a factor of nine. O The intensity increases by a factor of nine. O The intensity increases by a factor of three. O The intensity decreases by a factor of three. O The intensity is unchanged by the increase in E