(IV) A hollow conductor waveguide has a rectangular cross section of 2a by a. If we want it to allow a microwave at 15 GHz to propagate only in four lowest TE modes, what is the requirement on the value of a?

Derive an expression for the wave equation in free space. Intrinsic impedance for free space =120π or 377Ω, Justify?

(I) In an EM wave traveling west, the B field oscillates upand down vertically and has a frequency of 90.0 kHz andan rms strength of  7.75 x 10-9T Determine the frequencyand rms strength of the electric field. What is the directionof its oscillations?

An industrial laser is used to bum a bole through a piece of metal. The average intensity of the light is Savg same laser, what is the rms value of the magnetic field? 1.27 x 10 W/m². What is the rms value of the electric field? For this ra a eloctronmagntic waues nhntes nowwrr uniformlyin all directions at a sinele