RPC 1

Electricity

refers to the flow of charged particles, typically electrons, through a material that conducts electricity.

Magnetism

is a property of certain materials that produce a magnetic field, which can attract or repel other magnetic materials and also produce a force on charged particles in motion.

Electromagnetism

is a branch of physics that studies the interactions between electrically charged particles.

Electromagnetism

It describes the behavior of electric and magnetic fields and their interaction with matter, and forms the basis for the electric and magnetic phenomena we see in the world around us, including light, electrical power, and magnetic forces

Photons

• are bundles of electromagnetic energy. They are the basic units that make up all light.

• is sometimes referred to as a “QUANTUM" of electromagnetic energy.

James Clerk Maxwell

He showed that visible light has both electric and magnetic properties hence the term, electromagnetic energy.

• Frequency

• Wavelength

• Velocity

• Amplitude

Properties of electromagnetic energy

Frequency

• The number of complete waves that pass a point in one second.

• It is equal to the number of crests or the number of valleys

• It is measured in Hertz (Hz) wherein one hertz is equal to one cycle per second.

Attenuation

• in X-rays refers to the reduction in intensity or the weakening of the X-ray beam as it passes through an object, such as the human body.

• is dependent on the thickness and composition of the material through which the X-rays are passing, as well as the energy of the X-rays themselves.

Wavelength

• The distance from any point on a wave to an identical point on the next wave.

• The distance from crest to crest or valley to valley.

Velocity

is a vector quantity that refers to "the rate at which an object changes its position." It can be defined as the distance covered by an object in unit time; m/s or d/t

3×10⁸ m/s or 186,000 mi/s.

The velocity of all electromagnetic radiation is

Amplitude

• The maximum distance that the particles of a wave's medium vibrate from their rest position.

• One-half the range from crest to valley.