Answer Happy

3 and 4 of hly Achievements 3.3, 3.5, 4.7 and 4.8. wireless computer network transmits data across the space between nodes as a modulation fa 2.45 GHz (microwave) carrier signal. The signal is able to pass through a brick wall that = 100 mm thick. Cecent measurements have determined that the dielectric function at microwave frequencies or the material of a typical building brick is E = Ereal + i Eimag = 5.86 + 0.68 i, nd the relative permeability is unity. 2) With reference to the electric and magnetic fields and relevant boundary conditions, <plain what happens to the 2.45 GHz radiation when it encounters the surface of a brick all, at normal incidence. (Suggested answer length: 150 words.) (14 marks) mas (12 mart ) Explain the physical interpretation of the two exponential terms in the expression for E art (c) (i). (Suggested answer length: 100 words.) (4 mar 1) Show that in passing perpendicularly through 100 mm of brick only about 16% of the _cident energy emerges. (Multiple reflections can be ignored but transmission across both terfaces must be taken into account.) (12 mar