15-1-the-electromagnetic-spectrum_summary

The Electromagnetic Spectrum is a broad range of types of electromagnetic radiation (EMR) with different frequencies and wavelengths. It includes visible light, but also extends to radio waves, microwaves, X-rays, and gamma rays. EM radiation is generated by a moving electric charge and can travel through empty space. Each type of EMR has its own range of frequencies and wavelengths, and they can all travel at the speed of light in a vacuum. The major difference between types of radiation is their frequencies, which are inversely proportional to their wavelengths, and energy, which increases with frequency. Different categories of electromagnetic waves have various applications, such as broadcasting, heating, and imaging technologies. The electromagnetic spectrum spans over 20 orders of magnitude. Harmful forms of EM radiation, such as X-rays and gamma rays, are on the high-frequency end of the spectrum, and are generally more penetrating than lower-frequency radiation. Understanding the properties and applications of the electromagnetic spectrum is crucial in many scientific and technological fields.