EM radiation is created when an atomic particle, such as an electron, is accelerated by an electric field, causing it to move. The movement produces oscillating electric and magnetic fields, which travel at right angles to each other in a bundle of light energy called a photon.
How do we use electromagnetic energy?
Up to the end of the microwave spectrum, most all modern conveniences that use electromagnetic energy in one way or another are in the lower frequency region, including millimeter waves, cell phones, WiFi, microwave ovens, space and terrestrial communications, radar for airports and military uses, AM and FM radio, …
What is electromagnetic energy in simple words?
Electromagnetic energy is a form of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space.
What is the importance of electromagnetic energy?
Explanation: Electromagnetic Radiation is important in Astronomy because it helps us see the universe. It helps us see on earth to (Visible Light) lol. For example, X-Rays are released by Pulsars, but not visible light, so that’s how we know they exist.
What are 4 ways you use electromagnetic energy?
The utility varies widely, for instance, gamma rays are used to destroy tumors, microwaves are used for heating, visible light helps us see, radio waves are used for radio channels.
What are 3 ways we describe electromagnetic energy?
Electromagnetic radiation can be described in three ways: energy, wavelength, or frequency. Wavelengths are typically measured in standard units, and when used to describe electromagnetic waves, it’s usually in meters (m).
Is electromagnetic energy potential energy?
Systems of objects ranging from atoms to planets can be arranged in many ways, resulting in many forms of potential energy: chemical, elastic, electrical (electromagnetic), gravitational, nuclear, and thermal energy.
How does an electromagnetic wave produce?
Electromagnetic waves are produced whenever electric charges are accelerated. This makes it possible to produce electromagnetic waves by letting an alternating current flow through a wire, an antenna. The frequency of the waves created in this way equals the frequency of the alternating current.
How do electromagnetic waves affect us?
At low frequencies, external electric and magnetic fields induce small circulating currents within the body. … The main effect of radiofrequency electromagnetic fields is heating of body tissues. There is no doubt that short-term exposure to very high levels of electromagnetic fields can be harmful to health.