CONCEPT MAP

A one-glance map of how every topic in the unit connects back to the single root idea of 'Electromagnetic waves'. One branch runs through Displacement Current and Maxwell's equations to the Production and Sources of electromagnetic waves (Hertz's experiment, and the rule that only an accelerating charge radiates). The other main branch runs to the EM Spectrum, which itself forks into an Emission Spectrum branch (splitting further into Continuous, Line and Band Emission Spectrum, according to whether the source is an incandescent solid, an excited atomic gas, or an excited molecular gas) and an Absorption Spectrum branch (splitting further into Continuous, Line and Band Absorption Spectrum), with the Line Absorption Spectrum branch leading on to the Fraunhofer Lines seen in the Sun's own spectrum -- the map's way of showing that everything from a capacitor's displa …