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What is radiation?

Updated: Feb 15, 2022

Electromagnetic radiation

Ectromagnetic radiation comes in many different types, although the differences between them are quantitative rather than qualitative. This teaching aid lists the different types that are generally recognised.

Electromagnetic radiation is an Electromagnetic oscillation wave that travels at speed of visible light carries. Quantum's energy called Photon.

Context Across the Spectrum

Ionizing Radiation

●Ionizing radiation is the energy produced from natural or artificial sources.

●Ionizing radiation has more energy than non-ionizing radiation

●Ionizing radiation has enough energy to cause chemical changes by breaking chemical bonds.

●Broken chemical bonds can cause damage to living tissue and lead to .

●The lowest energy limit for ionizing radiation is around 10 keV


Electromagnetic radiation consists of photons that have energy, but no mass or charge, such as radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma radiation (γ). A photon, as described by quantum theory, is a “particle” or “quantum” that contains a discrete quantity of electromagnetic energy which travels at a speed of light.

Different radiation is penetrating different materials

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