What is an electromagnetic field?
electromagnetic field is a field that has magnetic and electrical properties and surrounds objects with an electric charge. The field also interacts with charged objects in the field. Electromagnetic fields are present at the basic level across the universe, at different stages of force. For example, the Earth is surrounded by an electromagnetic field created by the movement of electrons inside the ground, and this field is used every day when people use compasses to orientate. The behavior of such fields is determined by the waves of generated energy and the frequency of their oscillations. Long wavelengths oscillate at low frequency, while short wavelengths oscillate at high frequency.
Whenever voltage is present, it forms an electric field. In a simple example, when the light is connected to the socket, but is not on, a small electric field is generated. When the light is on, causing the current flow, the movement of Electons creates a magnetic field. The electric field is still present, so an electromagnetic field is generated. Changes in ElekA trick field can generate magnetic activity, while changes in the magnetic field can generate electrical activity.
A classic example of an electromagnetic field is a field generated around high -energy power lines. Many people have noticed that they may feel the humming of energy around the electric lines and the study have shown that the electromagnetic field that surrounds high -energy power lines can indeed affect the growth of plants inside the field, an illustrating the way the electromagnetic field can affect charged particles inside the field.
electromagnetic spectrum leads from radio waves that have long wavelengths and low frequency, gamma rays, with short wavelengths and high frequency. Electromagnetic radiation on a higher end of an electromagnetic spectrum is known as ionizing radiation because it can remove electrons from the molecules and atoms by which they pass. Special interest is one area of electromagnetic spectrum: range of visible light. For example, when someone sees the orange carrots, it is because the eye is sensitive to wavelengths of reflected carrots.
Some types of electromagnetic fields were associated with health problems. Several cancer studies have shown that some child cancer was associated with high -energy electromagnetic fields. Although the electromagnetic field causes health problems, it may also be beneficial. For example, in the medical community, people use X -rays, a form of electromagnetic radiation to see the inside of the body and lasers, another form of electromagnetic radiation, to perform surgery.