Electromagnetic waves are created by the vibration of an electric charge. This vibration creates a wave which has both an electric and a magnetic component. An electromagnetic wave transports its energy through a vacuum at a speed of 3.00 x 108 m/s (a speed value commonly represented by the symbol c).
How electromagnetic waves are produced?
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.
Why do electromagnetic waves exist?
An electromagnetic wave exists when the changing magnetic field causes a changing electric field, which then causes another changing magnetic field, and so on forever. Unlike a STATIC field, a wave cannot exist unless it is moving.
What is the main source of electromagnetic radiation?
Answer 1: The most obvious source of electromagnetic energy and radiation is the sun. The sun provides the initial energy source for much of the remote sensing of the Earth surface. The remote sensing device that we humans use to detect radiation from the sun is our eyes.
How do electromagnetic waves play an important role in your life?
Electromagnetic waves are used to transmit long/short/FM wavelength radio waves, and TV/telephone/wireless signals or energies. They are also responsible for transmitting energy in the form of microwaves, infrared radiation (IR), visible light (VIS), ultraviolet light (UV), X-rays, and gamma rays.
Can radio waves pass through human body?
Absolutely! Radio waves not only pass through the human body, but are also absorbed by them. In fact, strong enough radio waves can kill a person if they are strong enough!
How do electromagnetic waves travel without a medium?
These changing fields form electromagnetic waves. Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.
What will happen if there is no electromagnetic waves?
Radio, Microwave, Infrared, Visible light, Ultraviolet, X-rays, Gamma rays. No EM wave means no sight. No transfer of energy from the sun to the Earth, so no life. If there are no EM waves in the world, then, there would be nothing.