Electromagnetic Waves: Definition, Properties, Formulas, Benefits, Spectrum
Electromagnetic Waves: Definition, Properties, Formulas, Benefits, Spectrum - In this discussion we will explain about electromagnetic waves. Which includes the understanding of electromagnetic waves, the nature of electromagnetic waves, the formula for electromagnetic waves, the benefits of waves electromagnetic waves, electromagnetic wave formulas, electromagnetic wave spectrum and examples of electromagnetic waves which are discussed in full and easy to understand. For more details, please see the review below carefully.
Electromagnetic Waves: Definition, Properties, Formulas, Benefits, Spectrum
Let's discuss the meaning of electromagnetic waves first.
Definition of Electromagnetic Waves
Electromagnetic waves are waves that radiate without going through a medium that carries electrical and magnetic (electromagnetic) energy. Electromagnetic waves do not use propagation media, as in other types of waves. Because it does not use a propagation medium, electromagnetic waves are also known as electromagnetic radiation.
There are four theories that form the basis of the existence of electromagnetic waves namely
- Electric charge that creates an electric field (put forward by Coulomb)
- The existence of a magnetic field around an electric current (proposed by Oersted)
- Changes in magnetic flux/magnetic field can cause an electric magnetic field (put forward by Faraday)
- Changes in the electric field can cause a magnetic field (proposed by Maxwell)
Properties of Electromagnetic Waves
According to the Hertz experiment, it can be found that electromagnetic waves have the following properties:
- The electric and magnetic fields are perpendicular to each other and both are perpendicular to the direction of wave propagation.
- One of the transverse waves
- The electric and magnetic fields change simultaneously so that they have maximum and minimum values at the same time and place
- The speed of electromagnetic wave propagation only depends on the electric and magnetic properties of the flowing medium. The speed of electromagnetic waves in a vacuum is (3.108 m/s)
- The magnitude of the magnetic field and electric field are directly proportional to each other, namely E = c x B.(E = electric field, B = magnetic field, c = speed of electromagnetic waves).
- Not distorted by magnetic or electric fields
- Reflection, refraction, interference, diffraction, and polarization occur. Wavelength and frequency are connected via the equation. c = λ. f with description:
c = Fast propagation of light (3.108 m/s)
λ = Wavelength (m)
f = Frequency (Hz) - Not electrically charged
Electromagnetic Wave Formula
The speed of propagation of electromagnetic waves by Maxwell is calculated by the following formula:
Benefits of Electromagnetic Waves
The benefits of electromagnetic waves are as follows:
- X-rays have shorter wavelengths and higher frequencies, making them easier to penetrate more material is impermeable to the low-frequency light waves absorbed by the material the. X-rays are used by doctors when looking at internal organs such as bones to diagnose patients. And also, x-rays are used at airports to see the contents of a passenger's bag or suitcase without having to open it so that the queuing process can be faster.
- Radio waves have a greater range. Radio waves are used for transmitting signals whose distances cannot be reached by waves infrared, but the amount of energy transmitted is not as great as that which can be transmitted by waves infrared. Radio waves are used by TV stations, radios and other devices to transmit communication signals. And also radio waves are used for radar to determine the position of objects above the earth's surface and are also used for satellite imaging to the earth for the need to make three-dimensional maps.
- Infrared light cannot be seen but can be detected above the red light spectrum which is often used to transfer a form of energy that is not too large. Infrared light is used in game consoles and several types of remotes so that users do not need cable media to transmit data in the form of energy.
- Microwaves have a wavelength of the order of a few cm and a frequency close to the natural resonant frequency of water molecules in solids and liquids. Making microwaves quickly absorbed by water molecules in food such as the heating mechanism in a microwave grill such as in a microwave oven.
Electromagnetic Wave Spectrum
The spectrum of electromagnetic waves includes radio waves, television waves, microwaves, infrared rays, visible light, ultraviolet rays, x rays, gamma rays. Some of these electromagnetic waves have different wavelengths and frequencies. The following is a picture of the wavelengths and frequencies of some of the electromagnetic wave spectrum.
Examples of Electromagnetic Wave Problems
The following are examples of problems with electromagnetic waves:
1. Electromagnetic waves in a medium have a speed of 2.8 x 108 m/s. If the permittivity of the medium is 12.76 x 10–7 wb/Am, then what is the permeability of the medium?
Completion:
Is known:
c = 2.8 x 108 m/s
ε = 12.76 x 10–7 wb/Am
Answer:
Thus has been explained about Electromagnetic Waves: Definition, Properties, Formulas, Benefits, Spectrum, hopefully can add to your insight and knowledge. Thank you for visiting and don't forget to read other articles.
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