Table of Contents
What do you mean by EM waves?
Definition of ‘Electromagnetic Waves’ Definition: Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. In other words, EM waves are composed of oscillating magnetic and electric fields. They are hence known as ‘electromagnetic’ waves.
What do EM waves do?
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.
What do you mean by transverse nature of EM waves?
Transverse nature of electromagnetic waves means the electric and magnetic fields in an electromagnetic wave are perpendicular to each other and to the direction of propagation.
How do electromagnetic waves affect human life?
Possible health effects Exposure to low frequency fields that are strong enough can lead to dizziness, seeing light flashes and feeling tingling or pain through stimulation of nerves. Exposure to radiofrequency fields that are strong enough can lead to heating of body tissue, and result in damage to tissues and organs.
Where do EM waves come from?
EM waves originate from the vibration of charged particles, and unlike other waves, they can travel without a medium. The vast range of frequencies for EM waves is described by the electromagnetic spectrum. The spectrum stretches from the lowest frequency radio waves to the highest frequency gamma rays.
What is the difference between an EM Wave and a sound wave?
The major difference between sound waves and electromagnetic waves is that while sound waves require a medium to travel, electromagnetic waves do not. Sound waves also do carry energy when traveling, which is done by EM waves. While sound waves only act as waves, EM waves act as waves as well as particles.
Which EM Wave has the least amount of energy?
Radio waves have the lowest frequencies of all types of EMR, and its photons carry the least amount of energy. Usually, anything between 3kHz and 300 GHz is considered to be a radio wave, although some definitions class anything above 1 GHz or 3GHz as microwaves.
What is the highest possible frequency for an EM wave?
The highest measured frequencies of EM waves are Gamma-rays and are typically produced from the decay of atomic nuclei. The most powerful sources of gamma-rays (and usually the sources with the shortest wavelength) are caused by astronomical events.
Which EM waves are used in wireless technology?
It uses electromagnetic waves such as RF, IR, satellite, etc. While wireless communication is not limited to smartphones, you can also use this technology to connect different devices to the Internet at home or office wirelessly. So wireless technology has changed a lot and it is still changing things for good.