Which scientist experimentally proved the existence of electromagnetic waves?

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

The existence of electromagnetic waves was first predicted by the scientist .......

Choose the $CORRECT$ expression for the Ampere-Maxwell law.

According to Maxwell,which is the missing term in Maxwell-Ampere circuital law?

$A$ quantity $X$ is given by $\varepsilon_0 L \frac{\Delta V}{\Delta t}$, where $\varepsilon_0$ is the permittivity of free space, $L$ is the length, $\Delta V$ is a potential difference, and $\Delta t$ is a time interval. The dimension of $X$ is the same as that of