In physics, the density of a material is its mass per unit volume. The symbol for density is ρ (the Greek letter rho). Density is an intensive property, which means that it does not depend on the amount of material present. For example, one cubic meter of gold has the same density as one cubic… Read More
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An RF field is an electromagnetic field that oscillates at an (RF) Radio Frequency. It can be produced by either natural or man-made sources. RF fields are used in a variety of applications, including communications, radar, and medical diagnostics. RF fields are invisible to the human eye and cannot be felt by the body. However,… Read More
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Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Radio waves have frequencies as high as three hundred gigahertz to as low as thirty hertz. They are generated by electric charges undergoing acceleration, such as time-varying electric currents. Naturally occurring radio waves include radio emissions from… Read More
Continue ReadingRADAR Overview
(RADAR) is an acronym for RAdio Detection And Ranging; it is an object detection system that uses radio waves to determine the range, angle, or velocity of objects. It can detect aircraft, ships, spacecraft, and missiles. RADAR was developed in the 1930s and 1940s by several nations as a defense against enemy aircraft and missiles. RADAR works… Read More
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Radio is a medium of communication that uses electromagnetic waves to carry signals from one place to another. It is one of the most important inventions in the history of human communication. Radio has had a profound and wide-ranging impact on society, culture, and technology. Radio was first developed in the late 1800s by scientists… Read More
Continue ReadingNon-Ionizing
Non-ionizing radiation is a type of radiation that does not have enough energy to ionize atoms. This means that it cannot cause cancer or other health problems. Non-ionizing radiation includes ultraviolet light, infrared light, and radio waves. It also includes microwaves and lasers. Non-ionizing radiation is used in many different ways. Ultraviolet light is used… Read More
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Ionizing radiation is a type of energy that can be used to kill cells or damage DNA. It is often used in cancer treatment because it can target cancerous cells and kill them without harming healthy cells. Ionizing radiation can also be used for imaging tests such as X-rays and CT scans. There are some… Read More
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Radiation is a type of energy that travels through the air and can penetrate various materials. It is used in many different fields, including medicine, agriculture, and even security. While it has many benefits, radiation also has some risks that need to be considered. One risk of radiation is cancer. Exposure to high levels of… Read More
Continue ReadingElectric Resistance
Electric resistance is the measure of a material’s opposition to the flow of electric current. The higher the electric resistance of a material, the more it opposes the flow of current. Electric resistance is measured in ohms. Materials with high electric resistance are used in electrical circuits as resistors. Resistors are used to control the… Read More
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A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal level, divide voltages, and bias active elements. A wide variety of types of resistors are available, with standard values ranging from a fraction of an ohm to… Read More
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