Question

1a) It takes 6.7 years for radio signals from earth to reach a distant spaceship. What is the distance to the spaceship?

b) A magnetic resonance imaging (MRI) machine creates images of the human body using radio waves of frequency 46.2 x10⁶ Hz. What is the wavelength of these radio waves?

c) A microwave beam has a cross-sectional area of 0.04 m² and transmits an average power of 16000 W. Calculate the peak value of the electric field of the beam.
d)The Sun radiates power uniformly in all directions at a rate of 3.9 x 10²⁶ W. Mercury is 5.79 x 10¹⁰ m from The Sun. Calculate the intensity of solar radiation onto Mercury

Answer 1

formulas from different fields were used.