Microwaves
Microwaves
Microwaves (/ˈmaɪ.kroʊ.weɪvz/) are a form of electromagnetic radiation with wavelengths ranging from about one meter to one millimeter; with frequencies between 300 MHz (1 m) and 300 GHz (1 mm).
Etymology
The term "microwave" originates from the English word "micro-" which means small, and "wave", referring to the wave-like nature of electromagnetic energy.
Related Terms
- Electromagnetic spectrum: The range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes – visible light is one type of EM radiation, as are microwaves.
- Frequency: The number of occurrences of a repeating event per unit of time. In the context of microwaves, it refers to the number of cycles of the wave that pass a given point per second.
- Wavelength: The spatial period of a periodic wave—the distance over which the wave's shape repeats. For microwaves, this is typically measured in meters or millimeters.
- Electromagnetic radiation: The waves (or their quanta, photons) of the electromagnetic field, propagating (radiating) through space, carrying electromagnetic radiant energy.
Applications
Microwaves are widely used in modern technology, for example in point-to-point communication links, wireless networks, microwave radio relay networks, radar, satellite and spacecraft communication, medical diathermy and cancer treatment, remote sensing, radio astronomy, particle accelerators, spectroscopy, industrial heating, collision avoidance systems, garage door openers and keyless entry systems, and for cooking food in microwave ovens.
Health Effects
Exposure to microwaves can have adverse effects on human health. However, with proper safety measures, these risks can be minimized. Some potential health risks include burns and cataract formation. Prolonged or excessive exposure can lead to more serious conditions such as heat exhaustion or heat stroke.
External links
- Medical encyclopedia article on Microwaves
- Wikipedia's article - Microwaves
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