Electromagnetism is one of the fundamental forces in nature. It describes the interactions between electric and magnetic fields, which can be observed throughout our universe. Electromagnetic energy is responsible for many phenomena that occur in everyday life, such as electricity flowing through wires or light radiating from a lamp. The study of electromagnetism has led to numerous practical applications over time, including wireless communication technologies like radio and television broadcasting.
At its most basic level, electromagnetism involves two types of charge: positive and negative charges that interact with each other when they come into contact or are placed near each other within an electric field. This interaction creates a force called electrostatic repulsion or attraction depending on whether both charges have the same sign (positive-positive/negative-negative) or different signs (positive-negative). When current flows through a conductor such as wire it generates an associated magnetic field around it; this phenomenon is known as Faraday’s law of induction which states that moving electrical charges create magnetically induced currents in nearby conductors due to their relative motion with respect to one another – this forms what we call electromagnetic radiation waves!
The combination of these two fields results in various physical effects; for example when you move your hand close enough to an electrified object you will feel its static charge because electrons present on your skin are attracted by those already present on the said object creating what we know today as ‘electrostatic attraction’ – similarly if there were no air resistance then any charged particle would travel indefinitely along straight lines at constant speed due solely to its own electromagnetic force – this effect was first discovered by British scientist Michael Faraday who named it ‘the Law Of Magnetic Induction’ after his experiments showed how changing electric currents could induce magnetization changes elsewhere!
In addition scientists have also found out about how certain materials respond differently under varying levels & frequencies so they can be used effectively for things like shielding against harmful EMF emissions from electronic devices etc…
All these discoveries & more make up just some examples illustrating why understanding electromagnetism remains so important today even though much progress has been made since Maxwell’s original equations describing them first came out back 1873!