PREVIOUS ANSWERS [0/4.5 Points] DETAILS A dish antenna with a diameter of 21.4 m receives (at normal incidence) a radio signal from a distant source, as shown in the figure below. The radio signal is a continuous sinusoidal wave with amplitude may = 0.40 JV/m. Assume the antenna absorbs all the radiation that falls on the dish. (a) What is the amplitude of the magnetic field in this wave? 1.33E-8 X Apply the relation between the electric and magnetic field amplitudes in an electromagnetic wave. T (b) What is the intensity of the radiation received by the antenna? 66.66E-6 X Apply the expression for the energy flux in terms of the electric and/or magnetic fields for an electromagnetic wave. W/m2 (c) What is the power received by the antenna? 22.9 JX Apply the expression for the energy flux to find the rate at which energy reaches the area of the antenna. W