Which of these physical processes is responsible for the propagation of an electromagnetic wave? 1. The generation of an electric field due to a change in magnetic flux. 2. The generation of a magnetic field due to a change in electric flux. 3. The superposition (vector addition) of the electric field and the magnetic field.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.