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Radiation occurs when energy is emitted by a source, then travels through a medium, such as air, until it is absorbed by matter. Radiation can be described as being one of two basic types: non ionizing and ionizing.
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Electromagnetic radiation refers to energy that travels in waves through space at the speed of light. Electromagnetic radiation can be either ionizing or non-ionizing radiation depending on its frequency. Frequency describes how quickly the energy waves move up and down. The higher the frequency of the radiation the higher its energy. Frequency is ...
Non-ionizing radiation is also a type of electromagnetic radiation. This type of radiation does not have enough energy to detach electrons. Non-ionizing radiation includes: 1. radiofrequency waves 2. microwaves 3. infrared 4. visible light
Ionizing radiation is a type of radiation that can detach electrons from, or ionize, other atoms as they pass through matter. It includes electromagnetic waves and subatomic particles. Examples of ionizing radiation include: 1. some forms of electromagnetic radiation: 1.1. high energy ultraviolet radiation 1.2. X-rays 1.3. gamma rays 2. particle ra...
Acoustical radiation is energy that is produced by a vibrating source and travels through air, water and solid materials in the form of waves. These vibrations produce sound. Sound can be separated into 3 categories: 1. Infrasound is the range of low frequency sound waves that humans do not typically hear. Scientists measure infrasound levels to de...
Radiation, flow of atomic and subatomic particles and of waves, such as those that characterize heat rays, light rays, and X rays. All matter is constantly bombarded with radiation of both types from cosmic and terrestrial sources. This article delineates the properties and behaviour of radiation.
Mar 20, 2020 · A chart of the public's exposure to ionizing radiation (displayed below) shows that people generally receive a total annual dose of about 620 millirem. Of this total, natural sources of radiation account for about 50 percent, while man-made sources account for the remaining 50 percent.
Feb 22, 2024 · All of us are exposed to radiation every day, from natural sources such as minerals in the ground, and man-made sources such as medical x-rays. According to the National Council on Radiation Protection and Measurements (NCRP), the average annual radiation dose per person in the U.S. is 6.2 millisieverts (620 millirem) millirem) .
Jul 7, 2023 · Every day, people inhale and ingest forms of radiation from air, food and water. Today, the most common artificial sources of human exposure to radiation are X-ray machines and radiopharmaceuticals used for diagnostic or radiotherapy and other medical devices.
We are exposed to ionizing radiation from natural sources in two ways: We are surrounded by naturally-occurring radioactive elements in the soil and stones, and are bathed with cosmic rays entering the earth's atmosphere from outer space.
