Answer Happy

Question 6 (20 points, 5 points each part) The electric field of an electromagnetic wave that propagates in air (refractive index n=1.0) is: E = (5.2 x 10-3 V/m) sin(2.3 x 10 x - 6.9 x 1014) Assume distance is given in meters and time is in seconds. (a) What is the direction of polarization of this wave and in which direction does it propagate? (b) Write the expression for the corresponding magnetic field vector. (c) What is the wavelength (2.) and frequency of the wave? (d) Assume this wave arrives at an interface between air and an oil (refractive index n=2.1) at normal incidence and the transmitted wave carries 64% of the intensity of the incident (original) wave. Find the amplitude of the electric field, the wavelength and frequency of the wave within the oil. Hint: Intensity is proportional to square of the electric field.