Which scientist first time produced electromagnetic waves in laboratory?

Sea water at frequency $v = 4 \times 10^8\, Hz$ has permittivity $\epsilon \approx 80\epsilon_0$,permeability $\mu = \mu_0$ and resistivity $\rho = 0.25\,\Omega m$. Imagine a parallel plate capacitor immersed in sea water and driven by an alternating voltage source $V(t) = V_0 \sin(2\pi vt)$. What fraction of the conduction current density is the displacement current density?

An accelerated electric charge emits

What suggestion was made to correct the discrepancies in Ampere's circuital law?

An insulator plate is passed between the plates of a capacitor. The displacement current

Which of the following Maxwell's equations is valid for time-varying conditions but not valid for static conditions?